Tootfinder

Trojan Horse Hunt in Time Series Forecasting for Space Operations
Krzysztof Kotowski, Ramez Shendy, Jakub Nalepa, Przemys{\l}aw Biecek, Piotr Wilczy\'nski, Agata Kaczmarek, Dawid P{\l}udowski, Artur Janicki, Evridiki Ntagiou
https://arxiv.org/abs/2506.01849

Trojan Horse Hunt in Time Series Forecasting for Space Operations
This competition hosted on Kaggle (https://www.kaggle.com/competitions/trojan-horse-hunt-in-space) is the first part of a series of follow-up competitions and hackathons related to the "Assurance for Space Domain AI Applications" project funded by the European Space Agency (https://assurance-ai.space-codev.org/). The competition idea is based on one of the real-life AI security threats identified within the project -- the adversarial poisoning of continuously fine-tuned satellite telemetry fore…

Space-time nonlinear reduced-order modelling for unsteady flows
Xiaodong Li, Davide Lasagna
https://arxiv.org/abs/2508.00638 https://arxiv.org/pdf/2508.006…

Space-time nonlinear reduced-order modelling for unsteady flows
This work investigates projection-based Reduced-Order Models (ROMs) formulated in the frequency domain, employing a space-time basis constructed with Spectral Proper Orthogonal Decomposition to efficiently represent dominant spatio-temporal coherent structures. Although frequency domain formulations are well suited to capturing time-periodic solutions, such as unstable periodic orbits, this study focusses on modelling statistically stationary flows by computing long-time solutions that approxim…

Riemannian Time Warping: Multiple Sequence Alignment in Curved Spaces
Julian Richter, Christopher Erd\"os, Christian Scheurer, Jochen J. Steil, Niels Dehio
https://arxiv.org/abs/2506.01635

Riemannian Time Warping: Multiple Sequence Alignment in Curved Spaces
Temporal alignment of multiple signals through time warping is crucial in many fields, such as classification within speech recognition or robot motion learning. Almost all related works are limited to data in Euclidean space. Although an attempt was made in 2011 to adapt this concept to unit quaternions, a general extension to Riemannian manifolds remains absent. Given its importance for numerous applications in robotics and beyond, we introduce Riemannian Time Warping~(RTW). This novel approa…

Block triangular preconditioning for inverse source problems in time-space fractional diffusion equations
Monoswini Majumdar, Stefano Serra-Capizzano, Rosita L. Sormani
https://arxiv.org/abs/2507.02809

Block triangular preconditioning for inverse source problems in time-space fractional diffusion equations
The current work investigates the effectiveness of block triangular preconditioners in accelerating and stabilizing the numerical solution of inverse source problems governed by time-space fractional diffusion equations (TSFDEs). We focus on the recovery of an unknown spatial source function in a multi-dimensional TSFDE, incorporating Caputo time-fractional derivatives and the fractional Laplacian. The inherent ill-posedness is addressed via a quasi-boundary value regularization, followed by a …

Sorcha: A Solar System Survey Simulator for the Legacy Survey of Space and Time
Stephanie R. Merritt, Grigori Fedorets, Megan E. Schwamb, Samuel Cornwall, Pedro H. Bernardinelli, Mario Juric, Matthew J. Holman, Jacob A. Kurlander, Siegfried Eggl, Drew Oldag, Maxine West, Jeremy Kubica, Joseph Murtagh, R. Lynne Jones, Peter Yoachim, Ryan R. Lyttle, Michael S. P. Kelley, Joachim Moeyens, Kathleen Kiker, Shantanu P. Naidu, Colin Snodgrass, Shannon M. Matthews, Colin Orion Chandler

Sorcha: A Solar System Survey Simulator for the Legacy Survey of Space and Time
The upcoming Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory is expected to revolutionize solar system astronomy. Unprecedented in scale, this ten-year wide-field survey will collect billions of observations and discover a predicted $\sim$5 million new solar system objects. Like all astronomical surveys, its results will be affected by a complex system of intertwined detection biases. Survey simulators have long been used to forward-model the effects of these biases on a…

Sorcha - a Solar System Survey Simulator for the Legacy Survey of Space and Time: #Rubin Observatory will discover millions of solar system objects: https://www.geekwire.com/2025/sorcha-software-rubin-observatory-millions/

A Constructive Proof of Existence and Mass Gap for Pure SU(3) Yang-Mills in Four-Dimensional Space-Time
D. C. Jacobsen
https://arxiv.org/abs/2506.00284 htt…

A Constructive Proof of Existence and Mass Gap for Pure SU(3) Yang-Mills in Four-Dimensional Space-Time
In this work we present a constructive proof that pure SU(3) Yang-Mills theory on R^4 exists as a nontrivial Wightman quantum field theory and exhibits a strictly positive mass gap. Our approach embeds the four-dimensional gauge theory as the zero-mode sector of a five-dimensional orbifold regulator that preserves gauge invariance and reflection positivity. A convergent joint polymer expansion on the Wilson lattice provides uniform control of the continuum (a->0) and infinite-volume (L->inf) li…

Type II radio bursts and space weather phenomena: A statistical study
Pooja Devi, Rositsa Miteva, Ramesh Chandra, Kostadinka Koleva, Bendict Lawrance
https://arxiv.org/abs/2507.01391

Type II radio bursts and space weather phenomena: A statistical study
In this paper, we present for the first time a comprehensive statistical study between type II radio bursts from the metric (m) to the dekameric-hectometric (DH) domain and their associated solar and space weather (SW) phenomena, namely, solar flares (SFs), sunspot (SN) configurations, filament eruptions, coronal mass ejections (CMEs), their interplanetary (IP) counterparts (ICMEs) and shocks, in situ detected particles and geomagnetic storms (GSs). The m-only and m+DH radio signatures are iden…

Static vs dynamic rough energy landscapes: Where is diffusion faster?
Dmitrii E. Makarov, Peter Sollich
https://arxiv.org/abs/2506.02195 https://

Static vs dynamic rough energy landscapes: Where is diffusion faster?
Molecules in dense environments, such as biological cells, are subjected to forces that fluctuate both in time and in space. While spatial fluctuations are captured by Lifson-Jackson-Zwanzig's model of "diffusion in a rough potential", and temporal fluctuations are often viewed as leading to additional friction effects, a unified view where the environment fluctuates both in time and in space is currently lacking. Here we introduce a discrete-state model of a landscape fluctuating both in time …

Line shapes in time- and angle-resolved photoemission spectroscopy explored by machine learning
Tami C. Meyer, Gesa-R. Siemann, Paulina Majchrzak, Thomas Seyller, Jennifer Rigden, Yu Zhang, Emma Springate, Charlotte Sanders, Philip Hofmann
https://arxiv.org/abs/2506.02137

Line shapes in time- and angle-resolved photoemission spectroscopy explored by machine learning
Time- and angle-resolved photoemission spectroscopy is a powerful technique for investigating the dynamics of excited carriers in quantum materials. Typically, data analysis proceeds via the inspection of time distribution curves (TDCs), which represent the time-dependent photoemission intensity in a region of interest -- often chosen somewhat arbitrarily -- in energy-momentum space. Here, we employ $k$-means, an unsupervised machine learning technique, to systematically investigate trends in T…

Existence of wave operators for Zakharov-Kuznetsov equation in two space dimensions
Jun-ichi Segata
https://arxiv.org/abs/2507.01288 https://

Existence of wave operators for Zakharov-Kuznetsov equation in two space dimensions
In this paper, we study long time behavior of solution to the two dimensional Zakharov-Kuznetsov equation in the framework of the final state problem. We construct a small global solution to the Zakharov-Kuznetsov equation which scatters to a given free solution. From this result, we have the existence of wave operators for the Zakharov-Kuznetsov equation. The proof is based on the space-time resonance method developed by Gustafson-Nakanishi-Tsai and Germain-Masmoudi-Shatah etc.

Revealing emergent many-body phenomena by analyzing large-scale space-time records of monitored quantum systems
Marcel Cech, Cecilia De Fazio, Mar\'ia Cea, Mari Carmen Ba\~nuls, Igor Lesanovsky, Federico Carollo
https://arxiv.org/abs/2507.00944

Revealing emergent many-body phenomena by analyzing large-scale space-time records of monitored quantum systems
Recent advances in quantum simulators permit unitary evolution interspersed with locally resolved mid-circuit measurements. This paves the way for the observation of large-scale space-time structures in quantum trajectories and opens a window for the \emph{in situ} analysis of complex dynamical processes. We demonstrate this idea using a paradigmatic dissipative spin model, which can be implemented, e.g., on Rydberg quantum simulators. Here, already the trajectories of individual experimental r…

Test Gravitational-Wave Polarizations with Space-Based Detectors
Jun-Shuai Wang, Chang Liu, Ju Chen, Jibo He
https://arxiv.org/abs/2506.02909 https://

Test Gravitational-Wave Polarizations with Space-Based Detectors
In this work, we systematically investigate the capability of space-based gravitational wave detectors in constraining parameters of non-tensor polarization modes. Using Bayesian inference and Fisher Information Matrix methods, we analyze gravitational wave signals from the inspiral phase of supermassive binary black hole mergers. By starting with time-domain signals and applying Fourier transforms, we avoid the use of the stationary phase approximation. We found an asymmetry in the estimation …

Time Invariant Sensor Tasking for Catalog Maintenance of LEO Space objects using Stochastic Geometry
Partha Chowdhury, Harsha M, Chinni Prabhunath Georg, Arun Balaji Buduru, Sanat K Biswas
https://arxiv.org/abs/2507.00076

Time Invariant Sensor Tasking for Catalog Maintenance of LEO Space objects using Stochastic Geometry
Catalog maintenance of space objects by limited number of ground-based sensors presents a formidable challenging task to the space community. This article presents a methodology for time-invariant tracking and surveillance of space objects in low Earth orbit (LEO) by optimally directing ground sensors. Our methodology aims to maximize the expected number of space objects from a set of ground stations by utilizing concepts from stochastic geometry, particularly the Poisson point process. We have…

There's a point here, but it's really narrower than it looks.
Many individuals can self-host to a level that meets their needs. Not everyone needs anti-DDoS on their web server. Not everyone needs 10GB of space for email accessible from any device anywhere. Almost no one needs a global anycast DNS network. https://

Series A, Episode 04 - Time Squad
JENNA: [Distorted V.O.] Report your location.
[Interior. Liberator teleport area]
JENNA: Gan, where are you?
[Jenna draws her gun and begins making her way to the hold. She reaches the hold, opens the door and enters.]
https://blake.torpidity.net/m/104/401

A Deterministic Partition Tree and Applications
Haitao Wang
https://arxiv.org/abs/2507.01775 https://arxiv.org/pdf/2507.01775

A Deterministic Partition Tree and Applications
In this paper, we present a deterministic variant of Chan's randomized partition tree [Discret. Comput. Geom., 2012]. This result leads to numerous applications. In particular, for $d$-dimensional simplex range counting (for any constant $d \ge 2$), we construct a data structure using $O(n)$ space and $O(n^{1+ε})$ preprocessing time, such that each query can be answered in $o(n^{1-1/d})$ time (specifically, $O(n^{1-1/d} / \log^{Ω(1)} n)$ time), thereby breaking an $Ω(n^{1-1/d})$ lower bound …

This https://arxiv.org/abs/2504.16251 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csOS_…

Adaptive and Efficient Dynamic Memory Management for Hardware Enclaves
The second version of Intel Software Guard Extensions (Intel SGX), or SGX2, adds dynamic management of enclave memory and threads. The first version required the address space and thread counts to be fixed before execution. The Enclave Dynamic Memory Management (EDMM) feature of SGX2 has the potential to lower launch times and overall execution time. Despite reducing the enclave loading time by 28--93%, straightforward EDMM adoption strategies actually slow execution time down by as much as 58%…

A kind editor had pity upon me:
#poetry

Upon a Single Fact
Upon a single fact is life supported: I-AM exists and works and speaks, before All time began, when space and earth were sorted, His plan completed, the Fartherest Edge and Core. The human mind cannot fully know The only limitless God whose spiritual Being Is Air to breathe and Wind that chooses to blow Wherever he desires, and no man seeing. This central truth: the eternal One not only Speaks but writes as well: his plan revealed, The unknown explained, the deepest secret unsealed- He lays the…

In-context Clustering-based Entity Resolution with Large Language Models: A Design Space Exploration
Jiajie Fu, Haitong Tang, Arijit Khan, Sharad Mehrotra, Xiangyu Ke, Yunjun Gao
https://arxiv.org/abs/2506.02509

In-context Clustering-based Entity Resolution with Large Language Models: A Design Space Exploration
Entity Resolution (ER) is a fundamental data quality improvement task that identifies and links records referring to the same real-world entity. Traditional ER approaches often rely on pairwise comparisons, which can be costly in terms of time and monetary resources, especially with large datasets. Recently, Large Language Models (LLMs) have shown promising results in ER tasks. However, existing methods typically focus on pairwise matching, missing the potential of LLMs to perform clustering di…

This https://arxiv.org/abs/2406.19157 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

How to build your latent Markov model -- the role of time and space
Statistical models that involve latent Markovian state processes have become immensely popular tools for analysing time series and other sequential data. However, the plethora of model formulations, the inconsistent use of terminology, and the various inferential approaches and software packages can be overwhelming to practitioners, especially when they are new to this area. With this review-like paper, we thus aim to provide guidance for both statisticians and practitioners working with latent…

Self-Supervised Spatial Correspondence Across Modalities
Ayush Shrivastava, Andrew Owens
https://arxiv.org/abs/2506.03148 https://arx…

Self-Supervised Spatial Correspondence Across Modalities
We present a method for finding cross-modal space-time correspondences. Given two images from different visual modalities, such as an RGB image and a depth map, our model identifies which pairs of pixels correspond to the same physical points in the scene. To solve this problem, we extend the contrastive random walk framework to simultaneously learn cycle-consistent feature representations for both cross-modal and intra-modal matching. The resulting model is simple and has no explicit photo-con…

This https://arxiv.org/abs/2504.18632 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Backward stochastic differential equations with nonlinear Young driver
We study backward stochastic differential equations (BSDEs) involving a nonlinear Young integral of the form $\int_{t}^{T}g(Y_{r})η(dr,X_{r})$, where the driver $η(t,x)$ is a space-time Hölder continuous function and $X$ is a diffusion process. Solutions to such equations provide a probabilistic interpretation of the solutions to stochastic partial differential equations (SPDEs) driven by space-time noise. We first obtain the existence and uniqueness of the solutions to these BSDEs under the…

This https://arxiv.org/abs/2505.13114 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Kahlerian approche to the Schrodinger equation in Siegel jacobi Space of the lognormal distribution
In this paper, we describe the evolution of spectral curves in the Siegel Jacobi space through the Schrodinger equation constructed from a Kahler geometry induced on the lognormal statistical manifold via Dombrowski's construction. We introduce new holomorphic structures and show that the Hamiltonian vector field coincides with the fundamental vector field generated by holomorphic isometries. We construct the time dependent Schrodinger equation from this geometric setting and show that the asso…

Parameter estimation of range-migrating targets using OTFS signals from LEO satellites
Tong Ding, Luca Venturino, Emanuele Grossi
https://arxiv.org/abs/2507.02385

Parameter estimation of range-migrating targets using OTFS signals from LEO satellites
This study investigates a communication-centric integrated sensing and communication (ISAC) system that utilizes orthogonal time frequency space (OTFS) modulated signals emitted by low Earth orbit (LEO) satellites to estimate the parameters of space targets experiencing range migration, henceforth referred to as high-speed targets. Leveraging the specific signal processing performed by OTFS transceivers, we derive a novel input-output model for the echo generated by a high-speed target in scena…

TDCOSMO 2025: Cosmological constraints from strong lensing time delays
Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frederic Courbin, Frederic Dux, Christopher D. Fassnacht, Joshua A. Frieman, Aymeric Galan, Daniel Gilman, Xiang-Yu Huang, Shawn Knabel, Danial Langeroodi, Huan Lin, Martin Millon, Takahiro Morishita, Veronica Motta, Pritom Mozumdar, Eric Paic, Anowar J. Shajib, William Sheu, Dominique Sluse, Alessandro Sonnenfeld, Chiara Spiniello, Massimo Stiavelli, Sher…

TDCOSMO 2025: Cosmological constraints from strong lensing time delays
We present cosmological constraints from 8 strongly lensed quasars (hereafter, the TDCOSMO-2025 sample). Building on previous work, our analysis incorporated new deflector stellar velocity dispersions measured from spectra obtained with the James Webb Space Telescope (JWST), the Keck Telescopes, and the Very Large Telescope (VLT), utilizing improved methods. We used integrated JWST stellar kinematics for 5 lenses, VLT-MUSE for 2, and resolved kinematics from Keck and JWST for RX J1131-1231. We …

Optimal Messaging Strategy for Incentivizing Agents in Dynamic Systems
Renyan Sun, Ashutosh Nayyar
https://arxiv.org/abs/2508.00188 https://arxiv.org/pdf/2…

Optimal Messaging Strategy for Incentivizing Agents in Dynamic Systems
We consider a finite-horizon discrete-time dynamic system jointly controlled by a designer and one or more agents, where the designer can influence the agents' actions through selective information disclosure. At each time step, the designer sends a message to the agent(s) from a prespecified message space. The designer may also take an action that directly influences system dynamics and rewards. Each agent uses its received message (and its own information) to choose its action. We are interes…

Phase-space distortion as a key to unraveling galactic bar buckling
Viktor D. Zozulia, Natalia Ya. Sotnikova, Anton A. Smirnov
https://arxiv.org/abs/2506.00631

Phase-space distortion as a key to unraveling galactic bar buckling
For the first time, we investigate the resonant structure of $N$-body galactic bar at the stage of buckling using action-angle variables. We studied the evolution of vertical actions ($J_z$) and angles associated with vertical resonance ($θ_\mathrm{res}=θ_z - θ_R$) for all orbits in the bar. For this purpose, we divide the orbits into types according to the behavior (libration or circulation) of their resonant angle with respect to fixed points $θ_\mathrm{res}=0$ and $π$ (vertical resonanc…

This https://arxiv.org/abs/2011.10153 has been replaced.
link: https://scholar.google.com/scholar?q=a

Enriched functional limit theorems for dynamical systems
We prove functional limit theorems for dynamical systems in the presence of clusters of large values which, when summed and suitably normalised, get collapsed in a jump of the limiting process observed at the same time point. To keep track of the clustering information, which gets lost in the usual Skorohod topologies in the space of càdlàg functions, we introduce a new space which generalises the already more general spaces introduced by Whitt. Our main applications are to hyperbolic and non…

Record-breaking heat wave scorches Southeast US #UnitedStates

Record-breaking heat wave scorches Southeast US
Residents in the Southeast U.S. are no strangers to heat in the summertime But this week's sweltering hot weather set at least one record and has forecasters urging residents to limit time outside on Tuesday if possible—and stay hydrated.

Solar storm has reached Earth, could bring auroras to U.S. South
A severe” solar storm
— rated a level 4 out of 5
— arrived on Earth earlier than NOAA’s Space Weather Prediction Center had forecast on Saturday.
Northern lights were visible as far south as New Mexico, and vivid displays were photographed in Wyoming, Utah and Washington state.

Before dawn, the aurora could even be detected in the Mid-Atlantic with a camera
— which is more sensitive to ligh…

Solar storm has reached Earth, could bring auroras to U.S. South
A “severe” solar storm is expected to reach Earth any time from late morning to Sunday evening Eastern time, according to NOAA.

Fourth-order Adaptive Mesh Refinement both in space and in time for incompressible Navier-Stokes equations with Dirichlet boundary conditions
Shubo Zhao, Qinghai Zhang
https://arxiv.org/abs/2506.02663

Fourth-order Adaptive Mesh Refinement both in space and in time for incompressible Navier-Stokes equations with Dirichlet boundary conditions
We present a fourth-order projection method with adaptive mesh refinement (AMR) for numerically solving the incompressible Navier-Stokes equations (INSE) with subcycling in time. Our method features (i) a reformulation of INSE so that the velocity divergence decays exponentially on the coarsest level, (ii) a derivation of coarse-fine interface conditions that preserves the decay of velocity divergence on any refinement level of the AMR hierarchy, (iii) an approximation of the coarse-fine interf…

Bounded confidence dynamics generates opinion cascades on a growing scale-free network
David Hernandez, Guillaume Deffuant, Yerali Gandica
https://arxiv.org/abs/2506.02669

Bounded confidence dynamics generates opinion cascades on a growing scale-free network
We study the pairwise bounded confidence model on scale-free networks where new agents regularly arrive over time. The probability that arriving agents form links to preexisting ones depends on both agent degree and opinion proximity. In parameter value ranges where both factors impact the link choice, a new phenomenon is observed. Minor clusters continuously form on the periphery of the opinion space and remain stable for a time, before suddenly merging with a major cluster in the network. We …

This https://arxiv.org/abs/2409.08928 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Self-Organizing State-Space Models with Artificial Dynamics
We consider the problem of performing parameter and state inference in a state-space model (SSM) parametrized by a static parameter $θ$. A popular idea to address this problem consists of incorporating $θ$ in the state of the system and allowing its time evolution, modelled as a Markov chain $(θ_t)_{t\geq 1}$. This proxy model defines a so-called self-organizing SSM (SO-SSM) to which one may apply standard particle filters. However, the practical implementation of this idea in a theoreticall…

This https://arxiv.org/abs/2501.16423 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities
Slow flavor evolution (defined as driven by neutrino masses and not necessarily ``slow'') is receiving fresh attention in the context of compact astrophysical environments. In Part~I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves. The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach. It is best motivated for weak instabilities, which probab…

A late-time view of the progenitor candidates of the Type II-P SN 2009ib and SN 2012ec
Yi-Han Zhao, Xinyi Hong, Ning-Chen Sun, Zexi Niu, Justyn R. Maund, Jifeng Liu
https://arxiv.org/abs/2508.00550

A late-time view of the progenitor candidates of the Type II-P SN 2009ib and SN 2012ec
The progenitors of Type II-P supernovae (SNe) are generally considered to be red supergiants; however, the so-called "red supergiant problem" indicates that a deeper investigation into the progenitors of this class of SNe is necessary. SN 2009ib and SN 2012ec are two Type II-P SNe for which progenitor candidates have been identified in pre-explosion images. In this work, we use new, late-time Hubble Space Telescope observations to search for the disappearance of these two candidates and confirm…

Mirror descent for constrained stochastic control problems
Deven Sethi, David \v{S}i\v{s}ka
https://arxiv.org/abs/2506.02564 https://…

Mirror descent for constrained stochastic control problems
Mirror descent is a well established tool for solving convex optimization problems with convex constraints. This article introduces continuous-time mirror descent dynamics for approximating optimal Markov controls for stochastic control problems with the action space being bounded and convex. We show that if the Hamiltonian is uniformly convex in its action variable then mirror descent converges linearly while if it is uniformly strongly convex relative to an appropriate Bregman divergence, the…

MichelangeRoll: Sculpting Rational Distributions Exactly and Efficiently
Jui-Hsiang Shao, Hsin-Po Wang
https://arxiv.org/abs/2507.00915 https://

MichelangeRoll: Sculpting Rational Distributions Exactly and Efficiently
Simulating an arbitrary discrete distribution $D \in [0, 1]^n$ using fair coin tosses incurs trade-offs between entropy complexity and space and time complexity. Shannon's theory suggests that $H(D)$ tosses are necessary and sufficient, but does not guarantee exact distribution. Knuth and Yao showed that a decision tree consumes fewer than $H(D) + 2$ tosses for one exact sample. Drapper and Saad's recent work addresses the space and time aspect, showing that $H(D) + 2$ tosses, $O(n \log(n) \log…

Field generalization of elliptic Calogero-Moser system in the form of higher rank Landau-Lifshitz model
K. Atalikov, A. Zotov
https://arxiv.org/abs/2506.00938

Field generalization of elliptic Calogero-Moser system in the form of higher rank Landau-Lifshitz model
We prove gauge equivalence between integrable field generalization of the elliptic Calogero-Moser model and the higher rank XYZ Landau-Lifshitz model of vector type on 1+1 dimensional space-time. Explicit formulae for the change of variables are derived, thus providing the Poisson map between these models.

Complementary Time-Space Tradeoff for Self-Stabilizing Leader Election: Polynomial States Meet Sublinear Time
Yuichi Sudo
https://arxiv.org/abs/2505.23649 …

Complementary Time-Space Tradeoff for Self-Stabilizing Leader Election: Polynomial States Meet Sublinear Time
We study the self-stabilizing leader election (SS-LE) problem in the population protocol model, assuming exact knowledge of the population size $n$. Burman, Chen, Chen, Doty, Nowak, Severson, and Xu (PODC 2021) showed that this problem can be solved in $O(n)$ expected time with $O(n)$ states. Recently, Gąsieniec, Grodzicki, and Stachowiak (PODC 2025) proved that $n+O(\log n)$ states suffice to achieve $O(n \log n)$ time both in expectation and with high probability (w.h.p.). If substantially m…

This https://arxiv.org/abs/2411.16855 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Analytic Solution for the Motion of Spinning Particles in Kerr Space-Time
The equations of motion of massive test particles near Kerr black holes are separable in Boyer-Lindquist coordinates, as established by Carter. This separability, however, is lost when the particles are endowed with classical spin. We show that separability of the equations of motion can be recovered to linear order in spin by a shift of the worldline derived with the use of the hidden symmetry of Kerr space-time. Consequently, the closed-form solution of the motion is expressed in a way closel…

Climatology of Mars Topside Ionosphere during Solar Cycles 24 and 25 using MAVEN Dataset of 2015-2024
Lot Ram, Chanchal Singh, Diptiranjan Rout, Aadarsh Raj Sharma, Sumanta Sarkhel
https://arxiv.org/abs/2507.02368

Climatology of Mars Topside Ionosphere during Solar Cycles 24 and 25 using MAVEN Dataset of 2015-2024
The Mars ambient space environment evolves with the varying solar activity. Understanding the Martian space environment, particularly the topside ionosphere across different phases of Solar Cycles (SC) 24 \& 25 remains a key research gap in planetary ionospheric science. In this study, we utilized the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) mission data (150-500 km) from Martian years 32-38 (2015-2024) during solar quiet-time. This study investigated the behavior of topside ionosphe…

Muckenhoupt-weighted $L_q(L_p)$ boundedness for time-space fractional nonlocal operators
Yong Zhen Yang, Yong Zhou
https://arxiv.org/abs/2507.01890 https:/…

Muckenhoupt-weighted $L_q(L_p)$ boundedness for time-space fractional nonlocal operators
Based on the $ϕ(Δ)$-type operator studied by Kim \cite[\emph{Adv.~Math.}]{Kim2}, where $ϕ$ is a Bernstein function, we establish weighted $L_{q}(L_{p})$ estimates for solutions to the following fractional evolution equation: $$ \partial_{t}^αw(t,x) = ϕ(Δ)w(t,x) + h(t,x), \quad t > 0, \; x \in \mathbb{R}^{d}, $$ where $\partial_{t}^α$ denotes the Caputo derivative of $0 < α< 1$. To be specific, for all $1 < p, q < \infty$, we demonstrate that $$ \int_{0}^{\infty} \left( \int_{\mathbb{R}^…

Unconventional Spintronics from Chiral Perovskites
Yuntian Liu, Reshna Shrestha, Konstantin Denisov, Denzel Ayala, Mark van Schilfgaarde, Wanyi Nie, Igor \v{Z}uti\'c
https://arxiv.org/abs/2507.02060

Unconventional Spintronics from Chiral Perovskites
Spintronic devices typically employ heterostructures with ferromagnets which break time-reversal symmetry and have non-vanishing magnetization. With the growing class of materials that support spin-polarized carriers, current, and excitations,it is possible to envision emerging spintronic applications that are not limited to magnetoresistance. Here we focus on chiral perovskites with no net magnetization where the space-inversion and mirror symmetries are broken to induce chiral structure. The …

#TerryPratchett

Test mass charge management in the detection of gravitational waves in space based on UV micro-LED
Yuandong Jia, Zhihao Zhang, Yinbowen Zhang, Yuning Gu, Suwen Wang, Guozhi Chai, Zemin Zhang, Yi Zhang, Shanduan Zhang, Hongqing Huo, Zongfeng Li, Pengfei Tian, Yun Kau Lau
https://arxiv.org/abs/2507.00086

Test mass charge management in the detection of gravitational waves in space based on UV micro-LED
As an alternative to the ultraviolet light emitting diode(UV LED), the feasibility of utilizing UV micro-LED in the charge management in the detection of gravitational waves in space is experimentally studied. Compared with UV LED, micro-LED is more compact in size, has better current spreading, faster response time and longer operating life. Performance characteristics of micro-LEDs were measured, with peak wavelength of 254 nm, 262 nm, 274 nm, and 282 nm for each respective micro-LED, and the…

Basis Expansion Extrapolation based Long-Term Channel Prediction for Massive MIMO OTFS Systems
Yanfeng Zhang, Xu Zhu, Yujie Liu, Yong Liang Guan, David Gonz\'alez G., Vincent K. N. Lau
https://arxiv.org/abs/2507.01445

Basis Expansion Extrapolation based Long-Term Channel Prediction for Massive MIMO OTFS Systems
Massive multi-input multi-output (MIMO) combined with orthogonal time frequency space (OTFS) modulation has emerged as a promising technique for high-mobility scenarios. However, its performance could be severely degraded due to channel aging caused by user mobility and high processing latency. In this paper, an integrated scheme of uplink (UL) channel estimation and downlink (DL) channel prediction is proposed to alleviate channel aging in time division duplex (TDD) massive MIMO-OTFS systems. …

Floquet M\"obius topological insulators
Longwen Zhou, Fan Zhang, Jiaxin Pan
https://arxiv.org/abs/2506.01401 https://arxiv.org/p…

Floquet Möbius topological insulators
Möbius topological insulators hold twofold-degenerated dispersive edge bands with Möbius twists in momentum space, which are protected by the combination of chiral and ${\mathbb Z}_2$-projective translational symmetries. In this work, we reveal a unique type of Möbius topological insulator, whose edge bands could twist around the quasienergy $π$ of a periodically driven system and are thus of Floquet origin. By applying time-periodic quenches to an experimentally realized Möbius insulator …

This https://arxiv.org/abs/2312.01786 has been replaced.
link: https://scholar.google.com/scholar?q=a

Output-sensitive Complexity of Multi-Objective Integer Network Flow Problems
This paper addresses the output-sensitive complexity for linear multi-objective integer minimum cost flow (MOIMCF) problems and provides insights about the time complexity for enumerating all supported nondominated vectors. The paper shows that there can not exist an output-polynomial time algorithm for the enumeration of all supported nondominated vectors that determine the vectors in an ordered way in the outcome space unless NP = P. Moreover, novel methods for identifying supported nondomina…

Effective Versions of Strong Measure Zero
Matthew Rayman
#toXiv_bot_toot

Replaced article(s) found for quant-ph. https://arxiv.org/list/quant-ph/new
[3/3]:
- One-dimensional $\mathbb{Z}$-classified topological crystalline insulator under space-time invers...
Ling Lin, Yongguan Ke, Chaohong Lee

Path Planning using a One-shot-sampling Skeleton Map
Gabriel O. Flores-Aquino, Octavio Gutierrez-Frias, Juan Irving Vasquez
https://arxiv.org/abs/2507.02328

Path Planning using a One-shot-sampling Skeleton Map
Path planning algorithms aim to compute a collision-free path, and many works focus on finding the optimal distance path. However, for some applications, a more suitable approach is to balance response time, safety of the paths, and path length. In this context, a skeleton map is a useful tool in graph-based schemes, as it provides an intrinsic representation of free configuration space. However, skeletonization algorithms are very resource-intensive, being primarily oriented towards image proc…

This https://arxiv.org/abs/2503.18092 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Ergodic Optimization for Open Expanding Multi-valued Topological Dynamical Systems
We study the optimization of ergodic averages for multi-valued dynamical systems, i.e. where points may have multiple different forward orbits. Under upper semi-continuity assumptions, we show that the maximum space average with respect to invariant probability measures for such systems can be characterised in terms of maximum time averages on an auxiliary shift space. For all multi-valued expanding systems that are open mappings, we show that every Hölder continuous real-valued function can b…

Uncovering forest loss in gorilla park six months after M23 offensive in the DRC https://news.mongabay.com/2025/07/uncovering-forest-loss-in-gorilla-park-six-months-after-m23-offensive-in-the-drc/

Uncovering forest loss in gorilla park six months after M23 offensive in the DRC
Six months ago, the M23 rebel group seized Goma, one of the largest cities in the east of the Democratic Republic of Congo. In the time since, local activists and satellite images compiled by Mongabay have identified sites with soaring forest loss in Kahuzi-Biega National Park, southwest of Goma. In this vast area of primary […]

Self-similar vorticity around the boundary and non-uniqueness of solutions to the two-dimensional Navier-Stokes equations in the half space
Motofumi Aoki, Yasunori Maekawa
https://arxiv.org/abs/2507.02338

Self-similar vorticity around the boundary and non-uniqueness of solutions to the two-dimensional Navier-Stokes equations in the half space
In this paper we show the non-uniqueness of mild solutions to the two-dimensional forced Navier-Stokes equations in the half space under the noslip boundary condition, following the program established by Albritton, Bru{é}, and Colombo in 2022. Our construction of non-unique solutions is based on the instability of self-similar vorticity at high Reynolds numbers which concentrates around the boundary at the initial time. In our construction, therefore, a kind of boundary layer has to be taken …

Joint space-time modelling for upper daily maximum and minimum temperature record-breaking
Jorge Castillo-Mateo (University of Zaragoza), Zeus Gracia-Tabuenca (University of Zaragoza), Jes\'us As\'in (University of Zaragoza), Ana C. Cebri\'an (University of Zaragoza), Alan E. Gelfand (Duke University)
https://arxiv.o…

Joint space-time modelling for upper daily maximum and minimum temperature record-breaking
Record-breaking temperature events are now frequently in the news, proffered as evidence of climate change, and often bring significant economic and human impacts. Our previous work undertook the first substantial spatial modelling investigation of temperature record-breaking across years for any given day within the year, employing a dataset consisting of over sixty years of daily maximum temperatures across peninsular Spain. That dataset also supplies daily minimum temperatures (which, in fac…

General diffusions on metric graphs as limits of time-space Markov Chains
Alexis Anagnostakis
https://arxiv.org/abs/2507.23724 https://arxiv.org/pdf/2507.2…

General diffusions on metric graphs as limits of time-space Markov Chains
We introduce the Space-Time Markov Chain Approximation (STMCA) for a general diffusion process on a finite metric graph $Γ$. The STMCA is a doubly asymmetric (in both time and space) random walk defined on a subdivisions of $Γ$, with transition probabilities and conditional transition times that match, in expectation, those of the target diffusion. We derive bounds on the $p$-Wasserstein distances between the diffusion and its STMCA in terms of a thinness quantifier of the subdivision. This b…

The $Spin(4)$ gauge theory of space, time, gravitation, matter and dark matter
Tomi Koivisto, Lucy Zheng, Tom Zlosnik
https://arxiv.org/abs/2507.00968 http…

The $Spin(4)$ gauge theory of space, time, gravitation, matter and dark matter
A novel gauge-theoretic framework for spacetime and gravitation is proposed, in which a {\it Cartan khronon} field dynamically breaks the symmetry between space and time, enabling the emergence of temporality within a fundamentally Euclidean setting. Based on a $Spin(4)$ gauge structure, the theory provides a real-valued formulation of chiral spacetime, wherein the effects typically attributed to dark matter could instead be explained by the dynamics of gravitation. New results are presented wi…

This https://arxiv.org/abs/2301.10637 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Complexity of Geometric programming in the Turing model and application to nonnegative tensors
We consider a version of geometric programming problem consisting in minimizing a function given by the maximum of finitely many log-Laplace transforms of discrete nonnegative measures on a Euclidean space. Under a coerciveness assumption, we show that an $\varepsilon$-minimizer can be computed in a time that is polynomial in the input size and in $|\log\varepsilon|$. This is obtained by establishing bit-size estimates on approximate minimizers and by applying the ellipsoid method. We…

Beyond Interval MDPs: Tight and Efficient Abstractions of Stochastic Systems
Ibon Gracia, Morteza Lahijanian
https://arxiv.org/abs/2507.02213 https://

Beyond Interval MDPs: Tight and Efficient Abstractions of Stochastic Systems
This work addresses the general problem of control synthesis for continuous-space, discrete-time stochastic systems with probabilistic guarantees via finite abstractions. While established methods exist, they often trade off accuracy for tractability. We propose a unified abstraction framework that improves both the tightness of probabilistic guarantees and computational efficiency. First, we introduce multi-interval MDPs (MI-MDPs), a generalization of interval-valued MDPs (IMDPs), which allows…

Listening Across the Cosmic Time: Standard Sirens from Ground- and Space-Based Missions in the Next Decade
Alberto Salvarese, Hsin-Yu Chen, Alberto Mangiagli, Nicola Tamanini
https://arxiv.org/abs/2506.24030

Listening Across the Cosmic Time: Standard Sirens from Ground- and Space-Based Missions in the Next Decade
Precise measurement of the Hubble parameter will enable stringent tests of the standard model for cosmology. Standard sirens, using the luminosity distances measured by gravitational-wave observations of compact binary mergers, are expected to provide such measurements independently in the next decade. With the ground- and space-based gravitational wave observatories, the LIGO-Virgo-KAGRA (LVK) network and the Laser Interferometer Space Antenna (LISA), different types of standard sirens altoget…

Composable OS Kernel Architectures for Autonomous Intelligence
Rajpreet Singh, Vidhi Kothari
https://arxiv.org/abs/2508.00604 https://arxiv.org/pdf/2508.00…

Composable OS Kernel Architectures for Autonomous Intelligence
As intelligent systems permeate edge devices, cloud infrastructure, and embedded real-time environments, this research proposes a new OS kernel architecture for intelligent systems, transforming kernels from static resource managers to adaptive, AI-integrated platforms. Key contributions include: (1) treating Loadable Kernel Modules (LKMs) as AI-oriented computation units for fast sensory and cognitive processing in kernel space; (2) expanding the Linux kernel into an AI-native environment with…

STAR-RIS Transceivers: Integrated Sensing and Communication with Pulsed Signals
Hedieh Taremizadeh, Emanuele Grossi, Luca Venturino
https://arxiv.org/abs/2507.02346

STAR-RIS Transceivers: Integrated Sensing and Communication with Pulsed Signals
This study examines an integrated sensing and communication (ISAC) transceiver featuring a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) and a receiver equipped with a passive electronically scanned array (PESA) and a single digital channel. By utilizing a periodic pulsed signal emitted by a feeder, we introduce at the STAR-RIS a space modulation to illuminate two angular directions observed by the radar receiver, one in each half-space, and a time modul…

Predictions of the LSST Solar System Yield: Discovery Rates and Characterizations of Centaurs
Joseph Murtagh, Megan E. Schwamb, Stephanie R. Merritt, Pedro H. Bernardinelli, Jacob A. Kurlander, Samuel Cornwall, Mario Juri\'c, Grigori Fedorets, Matthew J. Holman, Siegfried Eggl, David Nesvorn\'y, Kathryn Volk, R. Lynne Jones, Peter Yoachim, Joachim Moeyens, Jeremy Kubica, Drew Oldag, Maxine West, Colin Orion Chandler

Predictions of the LSST Solar System Yield: Discovery Rates and Characterizations of Centaurs
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will start by the end of 2025 and operate for ten years, offering billions of observations of the southern night sky. One of its main science goals is to create an inventory of the Solar System, allowing for a more detailed understanding of small body populations including the Centaurs, which will benefit from the survey's high cadence and depth. In this paper, we establish the first discovery limits for Centaurs throughout th…

Modified wave operators for the defocusing cubic nonlinear Schr\"odinger equation in one space dimension with large scattering data
Masaki Kawamoto, Haruya Mizutani
https://arxiv.org/abs/2506.01871

Modified wave operators for the defocusing cubic nonlinear Schrödinger equation in one space dimension with large scattering data
In the present paper, we construct modified wave operators for the defocusing cubic nonlinear Schrödinger equation (NLS) in one space dimension without size restriction on scattering data. In the proof, we introduce a new formulation of the problem based on the linearization of the NLS around a prescribed asymptotic profile. For the linearized equation which is a system of Schrödinger equations with non-symmetric, time-dependent long-range potentials, we show a modified energy identity, as we…

LIGHTS. A robust technique to identify galaxy edges
Giulia Golini, Ignacio Trujillo, Dennis Zaritsky, Mireia Montes, Ra\'ul Infante Sainz, Garreth Martin, Nushkia Chamba, Ignacio Ruiz Cejudo, Andr\'es Asensio Ramos, Chen Yu Chuang, Mauro D'Onofrio, Sepideh Eskandarlou, S. Zahra Hosseini ShahiSavandi, Ouldouz Kaboud, Carlos Marrero de la Rosa, Minh Ngoc Le, Samane Raji, Javier Rom\'an, Nafise Sedighi, Zahra Sharbaf, Richard Donnerstein, Sergio Guerra Arencibia

LIGHTS. A robust technique to identify galaxy edges
The LIGHTS survey is imaging galaxies at a depth and spatial resolution comparable to what the Legacy Survey of Space and Time (LSST) will produce in 10 years (i.e., $\sim$31 mag/arcsec$^2$; 3$σ$ in areas equivalent to 10$^{\prime\prime}$$\times$ 10$^{\prime\prime}$). This opens up the possibility of probing the edge of galaxies, as the farthest location of in-situ star formation, with a precision that we have been unable to achieve in the past. Traditionally, galaxy edges have been analyzed i…

RESOLVE: Rare Event Surrogate Likelihood for Gravitational Wave Paleontology Parameter Estimation
Ann-Kathrin Schuetz, Alexander Migala, Adam Boesky, Alan W. P. Poon, Floor S. Broekgaarden, Aobo Li
https://arxiv.org/abs/2506.00757

RESOLVE: Rare Event Surrogate Likelihood for Gravitational Wave Paleontology Parameter Estimation
The first detection of gravitational waves, recognized by the 2017 Nobel Prize in Physics, has opened up a new research field: gravitational-wave paleontology. When massive stars evolve into black holes and collide, they create gravitational waves that propagate through space and time. These gravitational-waves, now detectable on Earth, act as fossils tracing the histories of the massive stars that created them. Estimating physics parameters of these massive stars from detected gravitational-wa…

Multi-goal-oriented anisotropic error control and mesh adaptivity for time-dependent convection-dominated problems
Markus Bause, Marius Paul Bruchh\"auser, Bernhard Endtmayer, Nils Margenberg, Ioannis Toulopoulos, Thomas Wick
https://arxiv.org/abs/2507.00723

Multi-goal-oriented anisotropic error control and mesh adaptivity for time-dependent convection-dominated problems
In this work, we present an anisotropic multi-goal error control based on the Dual Weighted Residual (DWR) method for time-dependent convection-diffusion-reaction (CDR) equations. This multi-goal oriented approach allows for an accurate and efficient error control with regard to several quantities of interest simultaneously. Using anisotropic interpolation and restriction operators, we obtain elementwise error indicators in space and time, where the spatial indicators are additionally separated…

RapidStore: An Efficient Dynamic Graph Storage System for Concurrent Queries
Chiyu Hao, Jixian Su, Shixuan Sun, Hao Zhang, Sen Gao, Jianwen Zhao, Chenyi Zhang, Jieru Zhao, Chen Chen, Minyi Guo
https://arxiv.org/abs/2507.00839

RapidStore: An Efficient Dynamic Graph Storage System for Concurrent Queries
Dynamic graph storage systems are essential for real-time applications such as social networks and recommendation, where graph data continuously evolves. However, they face significant challenges in efficiently handling concurrent read and write operations. We find that existing methods suffer from write queries interfering with read efficiency, substantial time and space overhead due to per-edge versioning, and an inability to balance performance, such as slow searches under concurrent workloa…

Quantum Speedups for Polynomial-Time Dynamic Programming Algorithms
Susanna Caroppo, Giordano Da Lozzo, Giuseppe Di Battista, Michael T. Goodrich, Martin N\"ollenburg
https://arxiv.org/abs/2507.00823

Quantum Speedups for Polynomial-Time Dynamic Programming Algorithms
We introduce a quantum dynamic programming framework that allows us to directly extend to the quantum realm a large body of classical dynamic programming algorithms. The corresponding quantum dynamic programming algorithms retain the same space complexity as their classical counterpart, while achieving a computational speedup. For a combinatorial (search or optimization) problem $\mathcal P$ and an instance $I$ of $\mathcal P$, such a speedup can be expressed in terms of the average degree $δ$…

This https://arxiv.org/abs/2505.24206 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On the time-decay with the diffusion wave phenomenon of the solution to the compressible Navier-Stokes-Korteweg system in critical spaces
We consider the initial value problem of the compressible Navier-Stokes-Korteweg equations in the whole space $\mathbb{R}^d$ ($d \ge 2$). The purposes of this paper are to obtain the global-in-time solution around the constant equilibrium states $(ρ_*,0)$ and investigate the $L^p$-$L^1$ type time-decay estimates in a scaling critical framework, where $ρ_*>0$ is a constant. In addition, we study the diffusion wave property came from the wave equation with strong damping for the solution with t…

Two-stage MCMC for Fast Bayesian Inference of Large Spatio-temporal Ordinal Data, with Application to US Drought
Staci Hepler, Rob Erhardt
https://arxiv.org/abs/2505.24594

Two-stage MCMC for Fast Bayesian Inference of Large Spatio-temporal Ordinal Data, with Application to US Drought
High dimensional space-time data pose known computational challenges when fitting spatio-temporal models. Such data show dependence across several dimensions of space as well as in time, and can easily involve hundreds of thousands of observations. Many spatio-temporal models result in a dependence structure across all observations and can be fit only at a substantial computational cost, arising from dense matrix inversion, high dimensional parameter spaces, poor mixing in Markov Chain Monte Ca…

Sorcha: Optimized Solar System Ephemeris Generation
Matthew J. Holman, Pedro H. Bernardinelli, Megan E. Schwamb, Mario Juri\'c, Drew Oldag, Maxine West, Kevin J. Napier, Stephanie R. Merritt, Grigori Fedorets, Samuel Cornwall, Jacob A. Kurlander, Siegfried Eggl, Jeremy Kubica, Kathleen Kiker, Joseph Murtagh, Shantanu P. Naidu, Colin Orion Chandler

Sorcha: Optimized Solar System Ephemeris Generation
Sorcha is a solar system survey simulator built for the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) and future large-scale wide-field surveys. Over the ten-year survey, the LSST is expected to collect roughly a billion observations of minor planets. The task of a solar system survey simulator is to take a set of input objects (described by orbits and physical properties) and determine what a real or hypothetical survey would have discovered. Existing survey simulators hav…

Forecasting the Impact of Source Galaxy Photometric Redshift Uncertainties on the LSST $3\times2$pt Analysis
Tianqing Zhang, Husni Almoubayyed, Rachel Mandelbaum, Markus Michael Rau, Nikolina \v{S}ar\v{c}evi\'c, C. Danielle Leonard, Jeffrey A. Newman, Brett Andrews, Shuang Liang, The LSST Dark Energy Science Collaboration
https://

Forecasting the Impact of Source Galaxy Photometric Redshift Uncertainties on the LSST $3\times2$pt Analysis
Photometric redshifts of the source galaxies are a key source of systematic uncertainty in the Rubin Observatory Legacy Survey of Space and Time (LSST)'s galaxy clustering and weak lensing analysis, i.e., the $3\times 2$pt analysis. This paper introduces a Fisher forecast code FisherA2Z for the LSST Year 10 (Y10) $3 \times 2$pt and cosmic shear analyses, utilizing a 15-parameter redshift distribution model, with one redshift bias, variance, and outlier rate per tomographic bin. FisherA2Z employ…

Slow convergence almost everywhere of ergodic averages
Valery V. Ryzhikov
https://arxiv.org/abs/2508.00463 https://arxiv.org/pdf/2508.00463

Slow convergence almost everywhere of ergodic averages
For an ergodic action of the group $Z^n$ on a probability space and a given arbitrarily slowly decreasing to zero sequence, there exists an integrable function such that the standard ergodic time averages for it converge almost everywhere to the spatial average of the function at a rate that is not asymptotically majorized by this sequence. This generalizes the Krengel effect about the absence of universal estimates for the rate of convergence in Birkhoff's ergodic theorem. The proof uses a wea…

A central limit theorem for the stochastic cable equation
Soma Nishino
https://arxiv.org/abs/2506.02755 https://arxiv.org/pdf/2506.02…

A central limit theorem for the stochastic cable equation
In this paper, we consider one-dimensional nonlinear stochastic cable equations driven by a multiplicative space-time white noise. Using the Malliavin--Stein's method, we prove the Gaussian fluctuation for the spatial average of the solution under the total variation distance with mild conditions. We also establish functional central limit theorem.

This https://arxiv.org/abs/2406.19533 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Testing quantum theory on curved space-time with quantum networks
Quantum technologies present new opportunities for fundamental tests of nature. One potential application is to probe the interplay between quantum physics and general relativity - a field of physics with no empirical evidence yet. Here we show that quantum networks open a new window to test this interface. We demonstrate how photon mediated entanglement between atomic or atom-like systems can be used to probe time-dilation induced entanglement and interference modulation. Key are non-local mea…

Noncommutative Geometry Inspired AdS Black Hole with a Cloud of Strings Surrounded by Quintessence-like fluid
Faizuddin Ahmed, Allan. R. P. Moreira, Abdelmalek Bouzenada
https://arxiv.org/abs/2508.00740

Noncommutative Geometry Inspired AdS Black Hole with a Cloud of Strings Surrounded by Quintessence-like fluid
We investigate the geometric and physical properties of an anti-de Sitter (AdS) black hole space-time coupled by a cloud of strings and surrounded by a quintessence-like fluid, all within the framework of non-commutative (NC) geometry. From the perspective of geometrical optics, we analyze the behavior of null geodesics, focusing on key optical features such as the effective potential, the structure and radius of the photon sphere, light deflection angles, photon trajectories, and the resulting…

Prediction of the SVOM MXT camera end of life spectral performance based onproton irradiation results
Clara Plasse, Diego G\"otz, Aline Meuris, Miguel Fernandez Moita, Philippe Ferrando, Leo Favier, Francesco Ceraudo
#toXiv_bot_toot

Ensemble Simulations of Coronal Mass Ejections in Interplanetary Space with Elliptical Cone Models
Johan Muhamad, Tiar Dani, Muhamad Zamzam Nurzaman, Rasdewita Kesumaningrum, Santi Sulistiani, Farahhati Mumtahana, Gerhana P. Putri, Ayu D. Pangestu, Ahmad Z. Utama
https://arxiv.org/abs/2507.23204

Ensemble Simulations of Coronal Mass Ejections in Interplanetary Space with Elliptical Cone Models
The estimation of CME arrival time strongly depends on the CME propagation models in interplanetary space and the geometrical aspects of the CME model. We conducted ensemble simulations of CMEs propagation with various elliptical cone shapes to study the relation between the CME speed and the optimum cone shape. We numerically searched for the best elliptical aspect ratio of the elliptical cone for each CME in our CME-ICME pair data. We found that the fast CMEs tend to have a higher elliptical …

SDR-Empowered Environment Sensing Design and Experimental Validation Using OTFS-ISAC Signals
Jun Wu, Yuye Shi, Weijie Yuan, Qingqing Cheng, Buyi Li, Xinyuan Wei
https://arxiv.org/abs/2507.01427

SDR-Empowered Environment Sensing Design and Experimental Validation Using OTFS-ISAC Signals
This paper investigates the system design and experimental validation of integrated sensing and communication (ISAC) for environmental sensing, which is expected to be a critical enabler for next-generation wireless networks. We advocate exploiting orthogonal time frequency space (OTFS) modulation for its inherent sparsity and stability in delay-Doppler (DD) domain channels, facilitating a low-overhead environment sensing design. Moreover, a comprehensive environmental sensing framework is deve…

Nonlinear reconstruction of general dark energy theories
Yunhao Gao, Baojiu Li, Jie Wang
https://arxiv.org/abs/2507.01442 https://arx…

Nonlinear reconstruction of general dark energy theories
The large variety and number of dark energy (DE) theories make it impractical to perform detailed analyses on a case-by-case basis, which has motivated proposals to ``parameterize" theories to reduce the size of theory space. The leading approach to do this is the effective field theory of dark energy (EFTofDE), which can describe general Horndeski-type theories with a small number of observationally accessible time-dependent functions. However, the EFTofDE primarily works for linear perturbati…

Predictions of the LSST Solar System Yield: Near-Earth Objects, Main Belt Asteroids, Jupiter Trojans, and Trans-Neptunian Objects
Jacob A. Kurlander, Pedro H. Bernardinelli, Megan E. Schwamb, Mario Juric, Joseph Murtagh, Colin Orion Chandler, Stephanie R. Merritt, David Nesvorny, David Vokrouhlicky, R. Lynne Jones, Grigori Fedorets, Samuel Cornwall, Matthew J. Holman, Siegfried Eggl, Drew Oldag, Maxine West, Jeremy Kubica, Peter Yoachim, Joachim Moeyens, Kathleen Kiker, Laura E. Buchan…

Predictions of the LSST Solar System Yield: Near-Earth Objects, Main Belt Asteroids, Jupiter Trojans, and Trans-Neptunian Objects
The NSF-DOE Vera C. Rubin Observatory is a new 8m-class survey facility presently being commissioned in Chile, expected to begin the 10yr-long Legacy Survey of Space and Time (LSST) by the end of 2025. Using the purpose-built Sorcha survey simulator (Merritt et al. In Press), and near-final observing cadence, we perform the first high-fidelity simulation of LSST's solar system catalog for key small body populations. We show that the final LSST catalog will deliver over 1.1 billion observations …

Multicontinuum splitting schemes for multiscale wave problems
Mohsen Alshahrani, Buzheng Shan
https://arxiv.org/abs/2506.01670 https://

Multicontinuum splitting schemes for multiscale wave problems
In this work, we propose multicontinuum splitting schemes for the wave equation with a high-contrast coefficient, extending our previous research on multiscale flow problems. The proposed approach consists of two main parts: decomposing the solution space into distinct components, and designing tailored time discretization schemes to enhance computational efficiency. To achieve the decomposition, we employ a multicontinuum homogenization method to introduce physically meaningful macroscopic var…

Over the Stability Space of a Multivariate Time Series
Roberto V\'asquez-Mart\'inez, Graciela Gonz\'alez-Far\'ias, Jos\'e Ulises M\'arquez Urbina, Francisco Corona
https://arxiv.org/abs/2506.22407

Over the Stability Space of a Multivariate Time Series
This paper jointly addresses the challenges of non-stationarity and high dimensionality in analysing multivariate time series. Building on the classical concept of cointegration, we introduce a more flexible notion, called stability space, aimed at capturing stationary components in settings where traditional assumptions may not hold. We examine the parametric Johansen procedure alongside two non-parametric alternatives based on dimensionality reduction techniques: Partial Least Squares and Pri…

Homogenization of parabolic problems for non-local convolution type operators under non-diffusive scaling of coefficients
Andrey Piatnitski, Elena Zhizhina
https://arxiv.org/abs/2506.00872

Homogenization of parabolic problems for non-local convolution type operators under non-diffusive scaling of coefficients
We study homogenization problem for non-autonomous parabolic equations of the form $\partial_t u=L(t)u$ with an integral convolution type operator $L(t)$ that has a non-symmetric jump kernel which is periodic in spatial variables and in time. It is assumed that the space-time scaling of the environment is not diffusive. We show that asymptotically the spatial and temporal evolutions of the solutions are getting decoupled, and the homogenization result holds in a moving frame.

Time-Dependent Hamiltonian Simulation via Time-Independent Dynamics in a Larger Space
Zecheng Li, Chunhao Wang
https://arxiv.org/abs/2507.19345 https://arx…

Time-Dependent Hamiltonian Simulation via Time-Independent Dynamics in a Larger Space
In this paper, we present a proof-of-concept quantum algorithm for simulating time-dependent Hamiltonian evolution by reducing the problem to simulating a time-independent Hamiltonian in a larger space using a discrete clock Hamiltonian construction. A similar construction was first explored for this simulation problem by Watkins, Wiebe, Roggero, and Lee [PRX Quantum, 2024]. Our algorithm improves upon their work in terms of the dependence on evolution time and precision. In addition, the compl…

An Improved Lower Bound for the Critical Parameter of the Stavskaya's Process via a Generalized Recurrent Method
Olivier Couronn\'e (MODAL'X)
https://arxiv.org/abs/2507.02452

An Improved Lower Bound for the Critical Parameter of the Stavskaya's Process via a Generalized Recurrent Method
Stavskaya's process, a discrete-time version of the contact process on $\Z$, is known to exhibit a phase transition at a critical parameter $\alpc$ whose exact value remains an open problem. Recent work by Ramos et al. established a lower bound by linking the process's survival to the non-percolation of a dual contour. The probability of this contour was estimated using a recurrent method on a state space of weighted random walks with short-term memory. In this paper, we generalize and extend t…

Derivation of CRB and Refined SINR Expressions for OTFS-RSMA LEO ISAC Systems
Bruno Felipe Costa, Taufik Abr\~ao
https://arxiv.org/abs/2506.02771 https://

Derivation of CRB and Refined SINR Expressions for OTFS-RSMA LEO ISAC Systems
This document provides detailed step-by-step derivations for the Cramér-Rao Bounds (CRB) for sensing parameters and the refined Signal-to-Interference-plus-Noise Ratio (SINR) expressions under imperfect Channel State Information (CSI) and imperfect Successive Interference Cancellation (SIC) for the Orthogonal Time Frequency Space (OTFS) Rate-Splitting Multiple Access (RSMA) framework presented in our main work "An Integrated OTFS-RSMA Framework for LEO Satellite ISAC: Modeling, Metrics, and Po…

Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
Marco Calz\`a, Davide Pedrotti, Guan-Wen Yuan, Sunny Vagnozzi
https://arxiv.org/abs/2507.02396

Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
In earlier companion papers, we showed that non-singular primordial black holes (PBHs) could account for all the dark matter (DM) over a significantly wider mass range compared to Schwarzschild PBHs. Those studies, mostly based on phenomenological metrics, are now extended by considering the quantum-corrected space-time recently proposed by Zhang, Lewandowski, Ma and Yang (ZLMY), derived from an effective canonical (loop) quantum gravity approach explicitly enforcing general covariance. Unlike …

On the time-decay with the diffusion wave phenomenon of the solution to the compressible Navier-Stokes-Korteweg system in critical spaces
Takayuki Kobayashi, Ryosuke Nakasato
https://arxiv.org/abs/2505.24206

On the time-decay with the diffusion wave phenomenon of the solution to the compressible Navier-Stokes-Korteweg system in critical spaces
We consider the initial value problem of the compressible Navier-Stokes-Korteweg equations in the whole space $\mathbb{R}^d$ ($d \ge 2$). The purposes of this paper are to obtain the global-in-time solution around the constant equilibrium states $(ρ_*,0)$ and investigate the $L^p$-$L^1$ type time-decay estimates in a scaling critical framework, where $ρ_*>0$ is a constant. In addition, we study the diffusion wave property came from the wave equation with strong damping for the solution with t…

Time-Dependent Parameters in Quantum Systems: Revisiting Berry Phase, Curvature and Gauge Connections
Georgios Konstantinou
https://arxiv.org/abs/2507.23347 https://

Time-Dependent Parameters in Quantum Systems: Revisiting Berry Phase, Curvature and Gauge Connections
We present a reformulation of quantum adiabatic theory in terms of an emergent electromagnetic framework, emphasizing the physical consequences of geometric structures in parameter space. Contrary to conventional approaches, we demonstrate that a Berry electric field naturally arises in systems with dynamic Hamiltonian, when the full time-dependent wavefunction is used to define the gauge potentials. This surprising result bridges the gap between static and dynamical formulations and leads to a…

Space-time finite element methods for nonlinear wave equations via elliptic regularisation
Lehel Banjai, Emmanuil H. Georgoulis, Brian Hennessy
https://arxiv.org/abs/2507.22757 …

Space-time finite element methods for nonlinear wave equations via elliptic regularisation
We present and analyse a new conforming space-time Galerkin discretisation of a semi-linear wave equation, based on a variational formulation derived from De Giorgi's elliptic regularisation viewpoint of the wave equation in second-order formulation. The method is shown to be well-posed through a minimisation approach, and also unconditionally stable for all choices of conforming discretisation spaces. Further, a priori error bounds are proven for sufficiently smooth solutions. Special attentio…

Random dynamical systems for McKean--Vlasov SDEs via rough path theory
Benjamin Gess, Rishabh S. Gvalani, Shanshan Hu
https://arxiv.org/abs/2507.02449 http…

Random dynamical systems for McKean--Vlasov SDEs via rough path theory
The existence of random dynamical systems for McKean--Vlasov SDEs is established. This is approached by considering the joint dynamics of the corresponding nonlinear Fokker-Planck equation governing the law of the system and the underlying stochastic differential equation (SDE) as a dynamical system on the product space $\RR^d \times \mathcal{P}(\RR^d)$. The proof relies on two main ingredients: At the level of the SDE, a pathwise rough path-based solution theory for SDEs with time-dependent …

Analogy of space-time as an elastic medium -- Study of the perturbation tensor of the metric $h_{\mu\nu}$ through the prism of the analogy of the theory of elasticity -- Analysis and potential consequences
David Izabel, Yves Remond, Matteo Lucas Ruggiero
https://arxiv.org/abs/2506.21984 …

Analogy of space-time as an elastic medium -- Study of the perturbation tensor of the metric $h_{μν}$ through the prism of the analogy of the theory of elasticity -- Analysis and potential consequences
A state of the art of the different deformations of space-time measured for more than a hundred years in the case of general relativity in the weak field is carried out. The phenomena of general relativity in low fields targeted are gravitational waves, Lense-thirring effects, gravitational lensing, gravitation around the earth or the sun. The overview of these different deformations highlights the different active components of the perturbation tensor of the metric $h_{μν}$. The authors show…

Planar pulsating traveling wave solutions of non-cooperative Fisher--KPP systems in space-time periodic media
L\'eo Girardin (CNRS, ICJ, MMCS), Gr\'egoire Nadin (IDP, CNRS)
https://arxiv.org/abs/2506.22003

Planar pulsating traveling wave solutions of non-cooperative Fisher--KPP systems in space-time periodic media
Non-cooperative Fisher-KPP systems with space-time periodic coefficients are motivated for instance by models for structured populations evolving in periodic environments. This paper is concerned with entire solutions describing the invasion of open space by a persistent population at constant speed. These solutions are important in the understanding of long-time behaviors for the Cauchy problem. Adapting methods developed for scalar equations satisfying the comparison principle as well as meth…

This https://arxiv.org/abs/2405.20198 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Well-posedness of Hibler's parabolic-hyperbolic sea ice model
This paper proves the local-in-time strong well-posedness of a parabolic-hyperbolic regularized version of Hibler's sea ice model. Hibler's model is the most frequently used sea ice model in climate science. Lagrangian coordinates are employed to handle the hyperbolic terms in the balance laws. The resulting problem is regarded as a quasilinear non-autonomous evolution equation. Maximal $\mathrm{L}^p$-regularity of the underlying linearized problem is obtained on an anisotropic ground space in …

This https://arxiv.org/abs/2505.15126 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Damping Effects on Global Existence and Scattering for an Inhomogeneous NLS Equation with Inverse-Square Potential
This work explores the global existence and scattering behavior of solutions to a damped, inhomogeneous nonlinear Schrodinger equation featuring a time-dependent damping term, an inverse-square potential, and an inhomogeneous nonlinearity. We establish global well-posedness in the energy space for subcritical, mass-critical, and energy-critical regimes, using Strichartz estimates, Hardy inequalities, and Gagliardo-Nirenberg-type estimates. For sufficiently large damping, we highlight how the in…

Analyticity and asymptotic behavior of solutions to the compressible Navier-Stokes-Korteweg equations with the zero sound speed in scaling critical spaces
Takayuki Kobayashi, Ryosuke Nakasato
https://arxiv.org/abs/2506.01573

Analyticity and asymptotic behavior of solutions to the compressible Navier-Stokes-Korteweg equations with the zero sound speed in scaling critical spaces
We consider the initial-value problem in the $d$-dimensional Euclidean space $\mathbb{R}^d$ $(d \ge 3)$ for the compressible Navier-Stokes-Korteweg equations under the zero sound speed case (namely, $P'(ρ_*)=0$, where $P=P(ρ)$ stands for the pressure). The system is well-known as the Diffuse Interface model describing the motion of a vaper-liquid mixture in a compressible viscous fluid. The purposes of this paper are to obtain the global-in-time solution around the constant equilibrium states…