Tootfinder

LLMs Don't Know Their Own Decision Boundaries: The Unreliability of Self-Generated Counterfactual Explanations
Harry Mayne, Ryan Othniel Kearns, Yushi Yang, Andrew M. Bean, Eoin Delaney, Chris Russell, Adam Mahdi
https://arxiv.org/abs/2509.09396

LLMs Don't Know Their Own Decision Boundaries: The Unreliability of Self-Generated Counterfactual Explanations
To collaborate effectively with humans, language models must be able to explain their decisions in natural language. We study a specific type of self-explanation: self-generated counterfactual explanations (SCEs), where a model explains its prediction by modifying the input such that it would have predicted a different outcome. We evaluate whether LLMs can produce SCEs that are valid, achieving the intended outcome, and minimal, modifying the input no more than necessary. When asked to generate…

Evaluation of Analytical Turbulence Closures for Quasi-Geostrophic Ocean Flows with Coastal Boundaries
Anantha Narayanan Suresh Babu, Akhil Sadam, Pierre F. J. Lermusiaux
https://arxiv.org/abs/2508.06678

Evaluation of Analytical Turbulence Closures for Quasi-Geostrophic Ocean Flows with Coastal Boundaries
Numerical turbulence simulations typically involve parameterizations such as Large Eddy Simulations (LES). Applications to geophysical flows, especially ocean flows, are further complicated by the presence of complex topography and interior landforms such as coastlines, islands, and capes. In this work, we extend pseudo-spectral quasi-geostrophic (QG) numerical schemes and GPU-based solvers to simulate flows with coastal boundaries using the Brinkman volume penalization approach. We incorporate…

POW: Political Overton Windows of Large Language Models
Leif Azzopardi, Yashar Moshfeghi
https://arxiv.org/abs/2509.08853 https://arxiv.org/pdf/2509.08853

POW: Political Overton Windows of Large Language Models
Political bias in Large Language Models (LLMs) presents a growing concern for the responsible deployment of AI systems. Traditional audits often attempt to locate a model's political position as a point estimate, masking the broader set of ideological boundaries that shape what a model is willing or unwilling to say. In this paper, we draw upon the concept of the Overton Window as a framework for mapping these boundaries: the range of political views that a given LLM will espouse, remain neutra…

Walking in the park today: a woman discussing with a friend some issues with becoming the third in a relationship. She wants clarity around boundaries, things like is it ok to use *that* bed, and the guy has been unhelpfully vague. Friend is supportive. I suspect it's doomed.

System size and boundaries determine the patterning dynamics of attracting active particles
Jan Rombouts, Michael L Zhao, Alexander Aulehla, Anna Erzberger
https://arxiv.org/abs/2509.08533

System size and boundaries determine the patterning dynamics of attracting active particles
Pattern formation often occurs in confined systems, yet how boundaries shape patterning dynamics is unclear. We develop techniques to analyze confinement effects in nonlocal advection-diffusion equations, which generically capture the collective dynamics of active self-attracting particles. We identify a sequence of size-controlled transitions that generate characteristic slow modes, leading to exponential increase of patterning timescales. Experimental measurements of multicellular dynamics co…

Magnetotransport across Weyl semimetal grain boundaries
Haoyang Tian, Vatsal Dwivedi, Adam Yanis Chaou, Maxim Breitkreiz
https://arxiv.org/abs/2509.09668 https://

Magnetotransport across Weyl semimetal grain boundaries
A clean interface between two Weyl semimetals features a universal, field-linear tunnel magnetoconductance of $(e^2/h)N_\mathrm{ho}$ per magnetic flux quantum, where $N_\mathrm{ho}$ is the number of chirality-preserving topological interface Fermi arcs. In this work we show that the linearity of the magnetoconductance is robust with to interface disorder. The slope of the magnetoconductance changes at a characteristic field strength $B_\mathrm{arc}$ -- the field strength for which the time take…

Beyond Pass@k: Breadth-Depth Metrics for Reasoning Boundaries
Marius Dragoi, Ioana Pintilie, Florin Gogianu, Florin Brad
https://arxiv.org/abs/2510.08325 https://

Beyond Pass@k: Breadth-Depth Metrics for Reasoning Boundaries
Reinforcement Learning with Verifiable Rewards (RLVR) has emerged as a powerful paradigm to improve Large Language Models on reasoning tasks such as coding, math or logic. To assess the reasoning boundary (the fraction of problems a model can solve) researchers often report Pass@k at large sampling budgets. Recent results reveal a crossover phenomenon: while RLVR models outperform the base model at small k values, the base model usually outperforms them when sampling a very large number of comp…

Stochastic Boundaries in Spatial General Equilibrium: A Diffusion-Based Approach to Causal Inference with Spillover Effects
Tatsuru Kikuchi
https://arxiv.org/abs/2508.06594 http…

Stochastic Boundaries in Spatial General Equilibrium: A Diffusion-Based Approach to Causal Inference with Spillover Effects
This paper introduces a novel framework for causal inference in spatial economics that explicitly models the stochastic transition from partial to general equilibrium effects. We develop a Denoising Diffusion Probabilistic Model (DDPM) integrated with boundary detection methods from stochastic process theory to identify when and how treatment effects propagate beyond local markets. Our approach treats the evolution of spatial spillovers as a Lévy process with jump-diffusion dynamics, where the…

MoVoC: Morphology-Aware Subword Construction for Geez Script Languages
Hailay Kidu Teklehaymanot, Dren Fazlija, Wolfgang Nejdl
https://arxiv.org/abs/2509.08812 https://

MoVoC: Morphology-Aware Subword Construction for Geez Script Languages
Subword-based tokenization methods often fail to preserve morphological boundaries, a limitation especially pronounced in low-resource, morphologically complex languages such as those written in the Geez script. To address this, we present MoVoC (Morpheme-aware Subword Vocabulary Construction) and train MoVoC-Tok, a tokenizer that integrates supervised morphological analysis into the subword vocabulary. This hybrid segmentation approach combines morpheme-based and Byte Pair Encoding (BPE) token…

"If any of the work, that any of us do, contributes to the stretching of culture, the stretching of boundaries of empathy that’s expected of an audience… that’s the holy grail."
—Riz Ahmed
#acting #coaching

Texas House Speaker Dustin Burrows sent a communication to House reps that payroll direct deposits are suspended until a quorum is reached.
The Democrats who fled the state did so specifically to prevent a quorum from being reached in order to block MAGA Republicans from advancing their plan to gerrymander new congressional district boundaries

MIORe & VAR-MIORe: Benchmarks to Push the Boundaries of Restoration
George Ciubotariu, Zhuyun Zhou, Zongwei Wu, Radu Timofte
https://arxiv.org/abs/2509.06803 https://…

MIORe & VAR-MIORe: Benchmarks to Push the Boundaries of Restoration
We introduce MIORe and VAR-MIORe, two novel multi-task datasets that address critical limitations in current motion restoration benchmarks. Designed with high-frame-rate (1000 FPS) acquisition and professional-grade optics, our datasets capture a broad spectrum of motion scenarios, which include complex ego-camera movements, dynamic multi-subject interactions, and depth-dependent blur effects. By adaptively averaging frames based on computed optical flow metrics, MIORe generates consistent moti…

USEANet: Ultrasound-Specific Edge-Aware Multi-Branch Network for Lightweight Medical Image Segmentation
Jingyi Gao, Di Wu, Baha lhnaini
https://arxiv.org/abs/2509.08860 https://…

USEANet: Ultrasound-Specific Edge-Aware Multi-Branch Network for Lightweight Medical Image Segmentation
Ultrasound image segmentation faces unique challenges including speckle noise, low contrast, and ambiguous boundaries, while clinical deployment demands computationally efficient models. We propose USEANet, an ultrasound-specific edge-aware multi-branch network that achieves optimal performance-efficiency balance through four key innovations: (1) ultrasound-specific multi-branch processing with specialized modules for noise reduction, edge enhancement, and contrast improvement; (2) edge-aware a…

Microstructure and phase stability within the AlMoNbTiZr system: design tools and compositional boundaries for a high-entropy alloy
Mariano Casas-Luna, Dalibor Preisler, Ji\v{r}\'i Kozl\'ik, Josef Str\'ask\'y
https://arxiv.org/abs/2510.08417

Microstructure and phase stability within the AlMoNbTiZr system: design tools and compositional boundaries for a high-entropy alloy
This study explores Ti-containing complex concentrated alloys (CCAs) within the AlMoNbTiZr system, focusing on compositions located in regions of the Bo-Md diagram characterized by low bond order (Bo) and d-orbital energy level (Md). Four alloys were designed near the line predicting stress-induced martensite formation in conventional Ti alloys, then cast, annealed at 1200°C, and water quenched. Their microstructures and phases were analyzed and compared against phase prediction tools commonly…

On the red--shift emission from the black hole horizons replicas
D. Pugliese, Z. Stuchlik
https://arxiv.org/abs/2509.08441 https://arxiv.org/pdf/2509.08441…

On the red--shift emission from the black hole horizons replicas
We examine the red-shift emission from special orbits (horizons replicas) where photons have the same angular velocity, in magnitude, as those of the Kerr black hole (BH) Killing horizons. We focus on two particular contexts of special significance for their observational implications. A set of these orbits is located in the BH photons shell. Therefore the analysis also connects the red-shifting or blue-shifting from replicas (defined through the BH light surfaces) to the BH shadow boundaries. …

Crosslisted article(s) found for cond-mat.soft. https://arxiv.org/list/cond-mat.soft/new
[1/1]:
- System size and boundaries determine the patterning dynamics of attracting active particles
Jan Rombouts, Michael L Zhao, Alexander Aulehla, Anna Erzberger

Causal Negative Sampling via Diffusion Model for Out-of-Distribution Recommendation
Chu Zhao, Eneng Yang, Yizhou Dang, Jianzhe Zhao, Guibing Guo, Xingwei Wang
https://arxiv.org/abs/2508.07243

Causal Negative Sampling via Diffusion Model for Out-of-Distribution Recommendation
Heuristic negative sampling enhances recommendation performance by selecting negative samples of varying hardness levels from predefined candidate pools to guide the model toward learning more accurate decision boundaries. However, our empirical and theoretical analyses reveal that unobserved environmental confounders (e.g., exposure or popularity biases) in candidate pools may cause heuristic sampling methods to introduce false hard negatives (FHNS). These misleading samples can encourage the …

Structure of Metric $1$-currents: approximation by normal currents and representation results
David Bate, Emanuele Caputo, Jakub Tak\'a\v{c}, Phoebe Valentine, Pietro Wald
https://arxiv.org/abs/2508.08017

Structure of Metric $1$-currents: approximation by normal currents and representation results
We prove the $1$-dimensional flat chain conjecture in any complete and quasiconvex metric space, namely that metric $1$-currents can be approximated in mass by normal $1$-currents. The proof relies on a new Banach space isomorphism theorem, relating metric $1$-currents and their boundaries to the Arens-Eells space. As a by-product, any metric $1$-current in a complete and separable metric space can be represented as the integral superposition of oriented $1$-rectifiable sets, thus dropping a fi…

Graphical small cancellation and hyperfiniteness of boundary actions
Chris Karpinski, Damian Osajda, Koichi Oyakawa
https://arxiv.org/abs/2509.05548 https://

Graphical small cancellation and hyperfiniteness of boundary actions
We study actions of (infinitely presented) graphical small cancellation groups on the Gromov boundaries of their coned-off Cayley graphs. We show that a class of graphical small cancellation groups, including (infinitely presented) classical small cancellation groups, admit hyperfinite boundary actions, more precisely, the orbit equivalence relation that they induce on the boundaries of the coned-off Cayley graphs is hyperfinite.

Magnetization-induced reordering of ground states phase diagram in a two-component Bose-Hubbard model
Oskar Stachowiak, Hubert Dunikowski, Emilia Witkowska
https://arxiv.org/abs/2508.06442

Magnetization-induced reordering of ground states phase diagram in a two-component Bose-Hubbard model
We investigate the influence of non-zero magnetization on the ground-state phase diagram of the two-component Bose-Hubbard model. Employing a mean-field theoretical framework, both analytically and numerically, we demonstrate that positions and sizes of specific phases on the diagram are magnetization dependent. In particular, non-zero magnetization introduces different Mott insulator phase boundaries for each of the two components. This effect leads to the emergence of a hybrid phase character…

Exploring the Viability of the Updated World3 Model for Examining the Impact of Computing on Planetary Boundaries
Nara Guliyeva, Eshta Bhardwaj, Christoph Becker
https://arxiv.org/abs/2510.07634

Exploring the Viability of the Updated World3 Model for Examining the Impact of Computing on Planetary Boundaries
The influential Limits to Growth report introduced a system dynamics-based model to demonstrate global dynamics of the world's population, industry, natural resources, agriculture, and pollution between 1900-2100. In current times, the rapidly expanding trajectory of data center development, much of it linked to AI, uses increasing amounts of natural resources. The extraordinary amount of resources claimed warrants the question of how computing trajectories contribute to exceeding planetary bou…

Cap amplitudes in random matrix models
Kazumi Okuyama
https://arxiv.org/abs/2509.03930 https://arxiv.org/pdf/2509.03930

Cap amplitudes in random matrix models
For general one-matrix models in the large $N$ limit, we introduce the cap amplitude $ψ(b)$ as the expansion coefficient of the 1-form $ydx$ on the spectral curve. We find that the dilaton equation for the discrete volume $N_{g,n}$ of the moduli space of genus-$g$ Riemann surfaces with $n$ boundaries is interpreted as gluing the cap amplitude along one of the boundaries. In this process, one of the boundaries is capped and the number of boundaries decreases by one. In a similar manner, the gen…

Why Software Signing (Still) Matters: Trust Boundaries in the Software Supply Chain
Kelechi G. Kalu, James C. Davis
https://arxiv.org/abs/2510.04964 https://

Why Software Signing (Still) Matters: Trust Boundaries in the Software Supply Chain
Software signing provides a formal mechanism for provenance by ensuring artifact integrity and verifying producer identity. It also imposes tooling and operational costs to implement in practice. In an era of centralized registries such as PyPI, npm, Maven Central, and Hugging Face, it is reasonable to ask whether hardening registry security controls obviates the need for end-to-end artifact signing. In this work, we posit that the core guarantees of signing, provenance, integrity, and accounta…

Compact moduli of elliptic surfaces with a multiple fiber
Donggun Lee, Yongnam Lee
https://arxiv.org/abs/2509.07467 https://arxiv.org/pdf/2509.07467…

Compact moduli of elliptic surfaces with a multiple fiber
Motivated by Miranda and Ascher--Bejleri's works on compactifications of the moduli space of rational elliptic surfaces with a section, we study constructions and boundaries of compact moduli spaces of elliptic surfaces with a multiple fiber. Particular emphasis is placed on rational elliptic surfaces without a section and on Dolgachev surfaces. Our main goal is to understand the limit surfaces when a multiple fiber degenerates into an additive type singular fiber, via $\mathbb{Q}$-Gorenstein s…

Replaced article(s) found for math.CO. https://arxiv.org/list/math.CO/new
[1/1]:
- Computing positroid cells in the Grassmannian of lines, their boundaries and their intersections
Susama Agarwala, Fatemeh Mohammadi, Francesca Zaffalon

The use of open boundaries in stochastic hydrodynamic models of nucleation
James F. Lutsko
https://arxiv.org/abs/2508.05528 https://arxiv.org/pdf/2508.0552…

The use of open boundaries in stochastic hydrodynamic models of nucleation
Stochastic hydrodynamics is a central tool in the study of first order phase transitions at a fundamental level. Combined with sophisticated free energy models, e.g. as developed in classical Density Functional Theory, complex processes such as crystallization can be modeled and information such as free energy barriers, nucleation pathways and the unstable eigenvector and eigenvalues determined. The latter are particularly interesting as they play key roles in defining the natural (unbiased) or…

VersionRAG: Version-Aware Retrieval-Augmented Generation for Evolving Documents
Daniel Huwiler, Kurt Stockinger, Jonathan F\"urst
https://arxiv.org/abs/2510.08109 https://

VersionRAG: Version-Aware Retrieval-Augmented Generation for Evolving Documents
Retrieval-Augmented Generation (RAG) systems fail when documents evolve through versioning-a ubiquitous characteristic of technical documentation. Existing approaches achieve only 58-64% accuracy on version-sensitive questions, retrieving semantically similar content without temporal validity checks. We present VersionRAG, a version-aware RAG framework that explicitly models document evolution through a hierarchical graph structure capturing version sequences, content boundaries, and changes be…

Incentivizing Safer Actions in Policy Optimization for Constrained Reinforcement Learning
Somnath Hazra, Pallab Dasgupta, Soumyajit Dey
https://arxiv.org/abs/2509.09208 https://…

Incentivizing Safer Actions in Policy Optimization for Constrained Reinforcement Learning
Constrained Reinforcement Learning (RL) aims to maximize the return while adhering to predefined constraint limits, which represent domain-specific safety requirements. In continuous control settings, where learning agents govern system actions, balancing the trade-off between reward maximization and constraint satisfaction remains a significant challenge. Policy optimization methods often exhibit instability near constraint boundaries, resulting in suboptimal training performance. To address t…

Towards enhanced mixing of a high viscous miscible blob in porous media
Mijanur Rahaman, Jiten C. Kalita, Satyajit Pramanik
https://arxiv.org/abs/2509.08034 https://

Towards enhanced mixing of a high viscous miscible blob in porous media
In this study, we investigate the rectilinear displacement and deformation of a highly viscous, miscible circular blob influenced by a less viscous fluid within a homogeneous porous medium featuring physically realistic no-flux boundaries. We utilize a fourth-order accurate compact finite difference scheme for the spatial discretization of the nonlinear partial differential equations that govern this phenomenon. The resulting semi-discrete equations are then integrated using the second-order Cr…

Bioverse: Assessing the Ability of Direct Imaging Surveys to Empirically Constrain the Habitable Zone via Trends in Albedo
Noah W. Tuchow, Christopher C. Stark, Daniel Apai, Martin Schlecker, Kevin K. Hardegree-Ullman
https://arxiv.org/abs/2509.07297

Bioverse: Assessing the Ability of Direct Imaging Surveys to Empirically Constrain the Habitable Zone via Trends in Albedo
Will future direct imaging missions such as NASA's upcoming Habitable Worlds Observatory (HWO) be able to understand Earth-sized planets as a population? In this study, we simulate the ability of space-based coronagraphy missions to uncover trends in planetary albedo as a function of instellation, and potentially constrain the boundaries of the habitable zone. We adapt the Bioverse statistical comparative planetology framework to simulate the scientific output of possible designs for HWO. With …

A Unified Framework for Spatial and Temporal Treatment Effect Boundaries: Theory and Identification
Tatsuru Kikuchi
https://arxiv.org/abs/2510.00754 https://

A Unified Framework for Spatial and Temporal Treatment Effect Boundaries: Theory and Identification
This paper develops a unified theoretical framework for detecting and estimating boundaries in treatment effects across both spatial and temporal dimensions. We formalize the concept of treatment effect boundaries as structural parameters characterizing regime transitions where causal effects cease to operate. Building on diffusion-based models of information propagation, we establish conditions under which spatial and temporal boundaries share common dynamics, derive identification results, an…

Not My Agent, Not My Boundary? Elicitation of Personal Privacy Boundaries in AI-Delegated Information Sharing
Bingcan Guo, Eryue Xu, Zhiping Zhang, Tianshi Li
https://arxiv.org/abs/2509.21712

Not My Agent, Not My Boundary? Elicitation of Personal Privacy Boundaries in AI-Delegated Information Sharing
Aligning AI systems with human privacy preferences requires understanding individuals' nuanced disclosure behaviors beyond general norms. Yet eliciting such boundaries remains challenging due to the context-dependent nature of privacy decisions and the complex trade-offs involved. We present an AI-powered elicitation approach that probes individuals' privacy boundaries through a discriminative task. We conducted a between-subjects study that systematically varied communication roles and delegat…

When we have something novel and unfamiliar like LLMs, especially something that hijacks our existing intuitions and provokes all kids of strong gut responses, seeing it as it really is requires multiple ways of seeing. And not just multiple •people• seeing it in multiple ways, but •individuals• who can have conversations across boundaries, take on multiple perspectives and synthesize them.
I am very anti-self-narrowing. Be large! Contain multitudes!

Good interview with Pritzker, I think he is doing a good job in resisting Trump where he can within legal boundaries.
#pritzker …

On analysis of problems of mathematical physics with non-Lipschitz boundaries
Anna Rozanova-Pierrat (MICS)
https://arxiv.org/abs/2509.02176 https://arxiv.o…

On analysis of problems of mathematical physics with non-Lipschitz boundaries
We review recent advances in solving problems of mathematical physics on domains with irregular boundaries in Rn. We distinguish two frameworks: a measure-free approach in the image of the trace operator spaces for extension domains and an L2-approach depending on a d-upper regular boundary measure. In both cases, the domains can have boundaries with different Hausdorff dimensions inside the interval (n -- 2, n). The generalization of the Poincar{é}-Steklov/Dirichlet-to-Neumann operator for th…

Crosslisted article(s) found for q-bio.CB. https://arxiv.org/list/q-bio.CB/new
[1/1]:
- System size and boundaries determine the patterning dynamics of attracting active particles
Jan Rombouts, Michael L Zhao, Alexander Aulehla, Anna Erzberger

Evaluating LLM-Generated Legal Explanations for Regulatory Compliance in Social Media Influencer Marketing
Haoyang Gui, Thales Bertaglia, Taylor Annabell, Catalina Goanta, Tjomme Dooper, Gerasimos Spanakis
https://arxiv.org/abs/2510.08111

Evaluating LLM-Generated Legal Explanations for Regulatory Compliance in Social Media Influencer Marketing
The rise of influencer marketing has blurred boundaries between organic content and sponsored content, making the enforcement of legal rules relating to transparency challenging. Effective regulation requires applying legal knowledge with a clear purpose and reason, yet current detection methods of undisclosed sponsored content generally lack legal grounding or operate as opaque "black boxes". Using 1,143 Instagram posts, we compare gpt-5-nano and gemini-2.5-flash-lite under three prompting str…

Regular Rotating Black Hole: Probing the boundaries of the Radiative Signatures and Jet Power
Subhadip Sau, John W. Moffat
https://arxiv.org/abs/2508.03473 https://

Regular Rotating Black Hole: Probing the boundaries of the Radiative Signatures and Jet Power
We perform a detailed observational analysis of several galactic X-ray binaries, focusing on the interplay between black hole spin, jet power, and radiative efficiency within the context of Blandford-Znajek-powered jets. Using updated measurements from continuum fitting and Fe-line methods, we constrain the spin parameter a and the deviation parameter $β$ for five key black hole systems: H1743-322, XTE J1550-564, GRS 1124-683, GRO J1655-40, and GRS 1915+105. For each system, we compare the all…

Reinterpretation of chiral anomaly on a lattice
Huan-Wen Wang, Bo Fu, Shun-Qing Shen
https://arxiv.org/abs/2509.08210 https://arxiv.org/pdf/2509.08210

Reinterpretation of chiral anomaly on a lattice
The chiral anomaly is a quantum mechanical effect for massless Dirac fermions in both particle physics and condensed matter physics. Here we present a set of effective models for single massless Dirac fermions in one- and three-dimensions in the whole Brillouin zone from higher-dimensional Chern insulators, which uniquely capture both the chiral fermion behavior near the Dirac point and high-energy states at Brillouin zone boundaries. In the presence of electromagnetic fields, the chiral coeffi…

Two Sides of the Same Optimization Coin: Model Degradation and Representation Collapse in Graph Foundation Models
Xunkai Li, Daohan Su, Sicheng Liu, Ru Zhang, Rong-Hua Li, Guoren Wang
https://arxiv.org/abs/2509.08401

Two Sides of the Same Optimization Coin: Model Degradation and Representation Collapse in Graph Foundation Models
Graph foundation models, inspired by the success of LLMs, are designed to learn the optimal embedding from multi-domain TAGs for the downstream cross-task generalization capability. During our investigation, graph VQ-MAE stands out among the increasingly diverse landscape of GFM architectures. This is attributed to its ability to jointly encode topology and textual attributes from multiple domains into discrete embedding spaces with clear semantic boundaries. Despite its potential, domain gener…

On the avoidance principle for codimension 1 space-time Brakke flows
Abdelmouksit Sagueni (UCBL)
https://arxiv.org/abs/2509.06441 https://arxiv.org/pdf/250…

On the avoidance principle for codimension 1 space-time Brakke flows
We prove that the spacetime Brakke flow constructed by Buet et al. is non-trivial as long as the initial varifold is a union of boundaries of domains of finite perimeter. In the codimension 1 setting, we show that, starting from a smooth boundary, the support of the mass measure of the spacetime Brakke flow coincides with the support of the classical mean curvature flow.

Just noticed that the 30 themes for the 2025 #30DayMapChallenge are now up!
#GISchat

Two irrationally elliptic closed orbits of Reeb flows on the boundary of star-shaped domain in $\mathbb{R}^{2n}$
Xiaorui Li, Hui Liu, Wei Wang
https://arxiv.org/abs/2510.06597 h…

Two irrationally elliptic closed orbits of Reeb flows on the boundary of star-shaped domain in $\mathbb{R}^{2n}$
There are two long-standing conjectures in Hamiltonian dynamics concerning Reeb flows on the boundaries of star-shaped domains in $\mathbb{R}^{2n}$ ($n \geq 2$). One conjecture states that such a Reeb flow possesses either $n$ or infinitely many prime closed orbits; the other states that all the closed Reeb orbits are irrationally elliptic when the domain is convex and the flow possesses finitely many prime closed orbits. In this paper, we prove that for dynamically convex Reeb flow on the boun…

All horizons are not boundaries in reality, but boundaries in perception. 🎵

Continuous cochains on Furstenberg boundaries and injectivity of the comparison map
Michelle Bucher, Alessio Savini
https://arxiv.org/abs/2510.05333 https://

Continuous cochains on Furstenberg boundaries and injectivity of the comparison map
Monod proved that any continuous cohomology of a semisimple Lie group $G$ can be represented by a measurable cocycle on the associated Furstenberg boundary, which we upgraded to an alternating cocycle. In the current paper we improve that result by showing that we can actually take a representing cocycle which is continuous on an explicit subset of generic tuples. We give an analogous result in the case of bounded cohomology. Finally, we exploit this characterization to prove the injectivity of…

Geometric Queries on Closed Implicit Surfaces for Walk on Stars
Tianyu Huang
https://arxiv.org/abs/2510.07275 https://arxiv.org/pdf/2510.07275

Geometric Queries on Closed Implicit Surfaces for Walk on Stars
Walk on stars (WoSt) is currently one of the most advanced Monte Carlo solvers for PDEs. Unfortunately, the lack of reliable geometric query approaches has hindered its applicability to boundaries defined by implicit surfaces. This work proposes a geometric query framework over closed implicit surfaces for WoSt, under the scope of walkin' Robin. Our key observation is that all WoSt queries can be formulated as constrained global optimization or constraint satisfaction problems. Based on our for…

Replaced article(s) found for cs.SD. https://arxiv.org/list/cs.SD/new
[1/1]:
- Video Soundtrack Generation by Aligning Emotions and Temporal Boundaries
Serkan Sulun, Paula Viana, Matthew E. P. Davies

The Phase Diagram for Percolating Free Surfaces in Disordered Assemblies of Faceted Grains
D. J. Priour Jr
https://arxiv.org/abs/2510.08296 https://arxiv.o…

The Phase Diagram for Percolating Free Surfaces in Disordered Assemblies of Faceted Grains
Percolation in systems made up of randomly placed impermeable grains is often examined in the context of system spanning clusters of connected solids forming above a relatively low critical grain density $ρ_{c1}$ or networks of interstitial void volumes ceasing to exist above a signficantly higher threshold $ρ_{c2}$. In this work, we interpret these percolation transitions as, respectively, the low and high density boundaries of percolating exposed surfaces which either ensheath clusters of i…

Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries
Sanu Mishra, Sean M. Thomas, Rod Mccabe, Eric D. Bauer, Filip Ronning
https://arxiv.org/abs/2507.22238

Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries
Grain boundaries are critical for determining the functionality of polycrystalline materials. Here we present on the structural $\&$ transport properties of grain boundaries in the unconventional superconductor CeCoIn$_5$. We provide a detailed recipe for the fabrication of isolated grain boundary devices from of as-grown polycrystalline samples of CeCoIn$_5$. Electron backscattered diffraction imaging of polycrystalline CeCoIn$_5$ samples reveals an abundance of $90^\circ$ misorientation grain…

Online Generic Event Boundary Detection
Hyungrok Jung, Daneul Kim, Seunggyun Lim, Jeany Son, Jonghyun Choi
https://arxiv.org/abs/2510.06855 https://arxiv.o…

Online Generic Event Boundary Detection
Generic Event Boundary Detection (GEBD) aims to interpret long-form videos through the lens of human perception. However, current GEBD methods require processing complete video frames to make predictions, unlike humans processing data online and in real-time. To bridge this gap, we introduce a new task, Online Generic Event Boundary Detection (On-GEBD), aiming to detect boundaries of generic events immediately in streaming videos. This task faces unique challenges of identifying subtle, taxonom…

Attention to Order: Transformers Discover Phase Transitions via Learnability
\c{S}ener \"Oz\"onder
https://arxiv.org/abs/2510.07401 https://arxiv…

Attention to Order: Transformers Discover Phase Transitions via Learnability
Phase transitions mark qualitative reorganizations of collective behavior, yet identifying their boundaries remains challenging whenever analytic solutions are absent and conventional simulations fail. Here we introduce learnability as a universal criterion, defined as the ability of a transformer model containing attention mechanism to extract structure from microscopic states. Using self-supervised learning and Monte Carlo generated configurations of the two-dimensional Ising model, we show t…

AWARE, Beyond Sentence Boundaries: A Contextual Transformer Framework for Identifying Cultural Capital in STEM Narratives
Khalid Mehtab Khan, Anagha Kulkarni
https://arxiv.org/abs/2510.04983

AWARE, Beyond Sentence Boundaries: A Contextual Transformer Framework for Identifying Cultural Capital in STEM Narratives
Identifying cultural capital (CC) themes in student reflections can offer valuable insights that help foster equitable learning environments in classrooms. However, themes such as aspirational goals or family support are often woven into narratives, rather than appearing as direct keywords. This makes them difficult to detect for standard NLP models that process sentences in isolation. The core challenge stems from a lack of awareness, as standard models are pre-trained on general corpora, leav…

A Geometrical Acoustics based Focusing Algorithm for Layered Media in Medical Ultrasound
Simon Hackl, Simon Hubmer, Ronny Ramlau
https://arxiv.org/abs/2510.05951 https://…

A Geometrical Acoustics based Focusing Algorithm for Layered Media in Medical Ultrasound
Ultrasound imaging is a widely used, non-invasive diagnostic tool in modern medicine. A crucial assumption is a constant sound speed in the observed medium. For large scale sound speed variations, this assumption leads to blurred and distorted images. In this paper, we present a Geometrical Acoustics based Focusing Algorithm (GOAT) which is able to correct for these aberrations, given a known layered medium setting with continuously differentiable medium boundaries. Existence and uniqueness con…

Heartbroken, like countless across the world, to have woken up to the news of the passing of Jane Goodall. Her fierce passion and audacious hope in connection and communication across boundaries - human, animal, and otherwise - as the lifeforce is a lesson for us all.
I had the privilege of hearing her speak. Filled with incredible wit and compassion, she began her address with the call of a chimpanzee and by thanking her mother. 🤍
In humility and hope.

Boundaries Program Deformation in Isolated Active Networks
Zixiang Lin, Shichen Liu, Shahriar Shadkhoo, Jialong Jiang, Heun Jin Lee, David Larios, Chunhe Li, Hongyi Bian, Anqi Li, Rob Phillips, Matt Thomson, Zijie Qu
https://arxiv.org/abs/2510.01713

Boundaries Program Deformation in Isolated Active Networks
Cellular structures must organize themselves within strict physical constraints, operating with finite resources and well-defined boundaries. Classical systems demonstrate only passive responses to boundaries, from surface energy minimization in soap films to strain distributions in elastic networks. Active matter fundamentally alters this paradigm - internally generated stresses create a bidirectional coupling between boundary geometry and mass conservation that enables dynamic control over ne…

A Unified Optimization Framework for Multiclass Classification with Structured Hyperplane Arrangements
V\'ictor Blanco, Harshit Kothari, James Luedtke
https://arxiv.org/abs/2510.05047

A Unified Optimization Framework for Multiclass Classification with Structured Hyperplane Arrangements
In this paper, we propose a new mathematical optimization model for multiclass classification based on arrangements of hyperplanes. Our approach preserves the core support vector machine (SVM) paradigm of maximizing class separation while minimizing misclassification errors, and it is computationally more efficient than a previous formulation. We present a kernel-based extension that allows it to construct nonlinear decision boundaries. Furthermore, we show how the framework can naturally incor…

Replaced article(s) found for cond-mat.other. https://arxiv.org/list/cond-mat.other/new
[1/1]:
- Pauli Stabilizer Models for Gapped Boundaries of Twisted Quantum Doubles and Applications to Comp...
Mohamad Mousa, Amit Jamadagni, Eugene Dumitrescu

Emergence of metastability on the hyperbolic lattice: Effects of boundary conditions
Vanessa Jacquier, Wioletta M. Ruszel
https://arxiv.org/abs/2510.05648 https://

Emergence of metastability on the hyperbolic lattice: Effects of boundary conditions
We investigate the Ising model on finite subgraphs of the hyperbolic lattice under minus boundary conditions and in the presence of a positive external field $h$. Interpreting the boundary as frozen or cold wall conditions, we show that, for small values of $h$, the system exhibits metastable behaviour. Our result is very surprising, since non-amenable graphs, such as hyperbolic lattices, feature exponentially growing boundaries, which typically destabilize local energy minima. In particular, w…

Lightsails for Interstellar Travel - Photonics for Propulsion, Thermal Management and Stability: #lightsail endeavor one of the most promising and exciting scientific pursuits in the twenty-first century. Looking forward, further progress must be made across numerous fields of science in order to bring lightsails to the next stage of viability. [...] We see the lightsail project shifting the paradigm of space exploration in the twenty-first century, inspiring generations of scientists at the boundaries of scientific and technical capabilities."

Robustness of analogue Hawking radiation in cavities with moving boundaries
Alberto Garc\'ia Mart\'in-Caro, Javier Olmedo, Jose M. S\'anchez Vel\'azquez
https://arxiv.org/abs/2507.13894

Robustness of analogue Hawking radiation in cavities with moving boundaries
In this work we explore the limitations and robustness of thermal radiation in dynamical Casimir systems serving as analogs for Hawking radiation. Through detailed numerical analysis, we characterize particle production spectra in cavities with moving boundaries under various configurations, including expanding, collapsing, and rigidly accelerating scenarios. We find that thermal signatures emerge in specific expanding cavity configurations but are highly dependent on frequency bands and accele…

"humanity’s ecological imprint on the living planet is now overshooting at least six of the nine planetary boundaries"
https://masto.ai/@cheng/115302852682690572

Limits at a Distance: Design Directions to Address Psychological Distance in Policy Decisions Affecting Planetary Boundaries
Eshta Bhardwaj, Han Qiao, Christoph Becker
https://arxiv.org/abs/2507.18913 …

Limits at a Distance: Design Directions to Address Psychological Distance in Policy Decisions Affecting Planetary Boundaries
Policy decisions relevant to the environment rely on tools like dashboards, risk models, and prediction models to provide information and data visualizations that enable decision-makers to make trade-offs. The conventional paradigm of data visualization practices for policy and decision-making is to convey data in a supposedly neutral, objective manner for rational decision-makers. Feminist critique advocates for nuanced and reflexive approaches that take into account situated decision-makers a…

How the Trump-Kennedy Alliance Is Pushing the Boundaries of Public Health (New York Times)
https://www.nytimes.com/2025/08/29/us/politics/trump-kennedy-alliance-vaccines.html
http://www.memeorandum.com/250829/p68#a250829p68

Now starting: The first part of our panel "Bridging Boundaries: Digital Humanities and Religious Studies" at the #IAHR2025 conference in beautiful Kraków.

Boundary actions of CAT(0) spaces: topological freeness and applications to $C^*$-algebras
Xin Ma, Daxun Wang, Wenyuan Yang
https://arxiv.org/abs/2510.05669 https://

Boundary actions of CAT(0) spaces: topological freeness and applications to $C^*$-algebras
In this paper, we study topological dynamics on the visual boundary and several combinatorial boundaries associated to $\operatorname{CAT}(0)$ spaces. Through verifying the freeness of Myrberg points on the boundaries, we prove that a large class of these boundary actions are topologically free strong boundary actions. These include certain visual boundary actions obtained from proper isometric actions of groups on proper $\operatorname{CAT}(0)$ spaces with rank-one elements, horofunction bound…

Exploring the interplay between Planetary Boundaries and Sustainable Development Goals using Large Language Models
Lamyae Rhomrasi, Pilar Manch\'on, Ricardo Vinuesa, Francesco Fuso-Nerini, J. Alberto Conejero, Javier Garc\'ia-Mart\'inez, Sergio Hoyas
https://arxiv.org/abs/2509.02638

Exploring the interplay between Planetary Boundaries and Sustainable Development Goals using Large Language Models
By analyzing 40,037 climate articles using Large Language Models (LLMs), we identified interactions between Planetary Boundaries (PBs) and Sustainable Development Goals (SDGs). An automated reasoner distinguished true trade-offs (SDG progress harming PBs) and synergies (mutual reinforcement) from double positives and negatives (shared drivers). Results show 21.1% true trade-offs, 28.3% synergies, and 19.5% neutral interactions, with the remainder being double positive or negative. Key findings …

Grain Boundary Anisotropy and Its Influence on Helium Bubble Nucleation, Growth, and Decohesion in Polycrystalline Iron
Yang Zhang, Peter Hatton, Blas P. Uberuaga, Jason R. Trelewicz
https://arxiv.org/abs/2509.07197

Grain Boundary Anisotropy and Its Influence on Helium Bubble Nucleation, Growth, and Decohesion in Polycrystalline Iron
The accumulation of helium bubbles at grain boundaries (GBs) critically degrades the mechanical integrity of structural materials in nuclear reactors. While GBs act as sinks for radiation-induced defects, their inherent structural anisotropy leads to complex helium bubble evolution behaviors that remain poorly understood. This work integrates accelerated molecular dynamics simulations and a novel atomic-scale metric, the flexibility volume (V_f), to establish the interplay between GB character,…

Gravity drives the flow within the Stewartson layer in centrifugal convection
Rushi Lai, Jun Zhong, Chao Sun
https://arxiv.org/abs/2509.07550 https://arxiv…

Gravity drives the flow within the Stewartson layer in centrifugal convection
We conduct three-dimensional numerical simulations on centrifugal convection (CC) in a closed annular container, incorporating gravity and no-slip top and bottom boundaries, to systematically investigate rotation-induced secondary flow. The Stewartson layer, identified by an elongated circulation in mean vertical velocity plots, emerges near the inner and outer cylinders only beyond a critical gravitational forcing. Quantitative analyses confirm that the layer thickness scales as $δ_{st}\sim E…

"If any of the work, that any of us do, contributes to the stretching of culture, the stretching of boundaries of empathy that’s expected of an audience… that’s the holy grail."
—Riz Ahmed
#acting #coaching

Dimers for Relativistic Toda Models with Reflective Boundaries
Kimyeong Lee, Norton Lee
https://arxiv.org/abs/2510.01768 https://arxiv.org/pdf/2510.01768…

Dimers for Relativistic Toda Models with Reflective Boundaries
We construct dimer graph for relativistic Toda chain associated with classical untwisted Lie algebra of A, B, C$_0$, C$_π$, D types and twisted A, D types. We show that the Seiberg-Witten curve of 5d $\CalN=1$ pure supersymmetric gauge theory of gauge group $G$ is a spectral curve of the relativistic Toda chain of the dual group $G^\vee$.

Modeling and Managing Temporal Obligations in GUCON Using SPARQL-star and RDF-star
Ines Akaichi, Giorgos Flouris, Irini Fundulaki, Sabrina Kirrane
https://arxiv.org/abs/2510.04652

Modeling and Managing Temporal Obligations in GUCON Using SPARQL-star and RDF-star
In the digital age, data frequently crosses organizational and jurisdictional boundaries, making effective governance essential. Usage control policies have emerged as a key paradigm for regulating data usage, safeguarding privacy, protecting intellectual property, and ensuring compliance with regulations. A central mechanism for usage control is the handling of obligations, which arise as a side effect of using and sharing data. Effective monitoring of obligations requires capturing usage trac…

Conformal dimension bounds, Pontryagin sphere boundaries, and algebraic fibering of right-angled Coxeter groups
Christopher H. Cashen, Pallavi Dani, Kevin Schreve, Emily Stark
https://arxiv.org/abs/2510.03430

Conformal dimension bounds, Pontryagin sphere boundaries, and algebraic fibering of right-angled Coxeter groups
We introduce a graph-theoretic condition, called $(n,m)$--branching, that ensures a combinatorial round tree with controlled branching parameters can be quasi-isometrically embedded in the Davis complex of the right-angled Coxeter group defined by the graph. This construction yields a lower bound on the conformal dimension of the boundary of such a hyperbolic group. We exhibit numerous families of graphs with this property, including many 1-dimensional spherical buildings. We prove an embeddi…

Cheaper access to universal fluctuations in integrable spin chains from boundary effects
Sylvain Prolhac
https://arxiv.org/abs/2509.05176 https://arxiv.org…

Cheaper access to universal fluctuations in integrable spin chains from boundary effects
Observing super-diffusive fluctuations from Kardar-Parisi-Zhang (KPZ) universality in isotropic integrable spin chains is usually challenging as it requires a fairly large number of spins in interaction. We demonstrate in this paper, in the context of classical spins, that accounting for boundary effects lowers the bar, down to a few dozen spins in some cases. Additionally, boundaries control the relaxation to stationarity, which leads to many new universal scaling functions to explore, both in…

Tangential touch between free and fixed boundaries for the fully nonlinear Alt-Phillips problem
Yamin Wang, Hui Yu
https://arxiv.org/abs/2509.02064 https://

Tangential touch between free and fixed boundaries for the fully nonlinear Alt-Phillips problem
For the fully nonlinear Alt-Phillips problem with parameter $γ\in(1,2)$, we show that the free boundary intersects the fixed boundary tangentially where the Dirichlet data vanish. For this range of $γ$, this result is new even when the operator is the Laplacian.

Evaluating High-Resolution Piano Sustain Pedal Depth Estimation with Musically Informed Metrics
Hanwen Zhang, Kun Fang, Ziyu Wang, Ichiro Fujinaga
https://arxiv.org/abs/2510.03750

Evaluating High-Resolution Piano Sustain Pedal Depth Estimation with Musically Informed Metrics
Evaluation for continuous piano pedal depth estimation tasks remains incomplete when relying only on conventional frame-level metrics, which overlook musically important features such as direction-change boundaries and pedal curve contours. To provide more interpretable and musically meaningful insights, we propose an evaluation framework that augments standard frame-level metrics with an action-level assessment measuring direction and timing using segments of press/hold/release states and a ge…

Decomposition of low-angle grain boundaries
Wei Wan, Changxin Tang, Eric R Homer
https://arxiv.org/abs/2509.02789 https://arxiv.org/pdf/2509.02789

Decomposition of low-angle grain boundaries
Grain boundaries (GBs) merge and grains disappear during microstructure evolution. However, the Peach-Koehler model predicts that particular stress states may reverse such a process by exerting differential Peach-Koehler forces on different dislocations. This work considers this reversal as GB decomposition and illustrates it in a low-angle asymmetric tilt GB and a low-angle mixed tilt-twist GB via atomistic simulation. In both cases, the dislocations separate into two GBs separated by a new gr…

Topology of Fermi seas and geometry of their boundaries for free particles in one and two-dimensional lattices
Guillermo R. Zemba
https://arxiv.org/abs/2509.00590 https://

Topology of Fermi seas and geometry of their boundaries for free particles in one and two-dimensional lattices
Free gases of spinless fermions moving on a geometric background with lattice symmetries are considered. Their Fermi seas and corresponding boundaries may be classified according to their topological properties at zero temperature. This is accomplished by considering the flat orbifolds $R^{d}/Γ$, with $Γ$ being the crystallographic group of symmetry in $d$-dimensional momentum space. For $d=1$, there are 2 topological classes: a circumference, corresponding to an insulator and an interval, id…

A note on spectral Monte-Carlo method for fractional Poisson equation on high-dimensional ball
Lisen Ding, Mingyi Wang, Dongling Wang
https://arxiv.org/abs/2510.04427 https://…

A note on spectral Monte-Carlo method for fractional Poisson equation on high-dimensional ball
Recently, a class of efficient spectral Monte-Carlo methods was developed in \cite{Feng2025ExponentiallyAS} for solving fractional Poisson equations. These methods fully consider the low regularity of the solution near boundaries and leverage the efficiency of walk-on-spheres algorithms, achieving spectral accuracy. However, the underlying formulation is essentially one-dimensional. In this work, we extend this approach to radial solutions in general high-dimensional balls. This is accomplished…

California Atty. Gen. Rob Bonta said Tuesday that he believes there is a
“legal pathway” for Democrats to present new congressional district maps directly to voters on a statewide ballot,
without input from the state’s independent redistricting commission.
Such a move, he suggested, would allow the state to counter Republican efforts to tilt next year’s midterm election by pushing redistricting measures that favor the GOP in conservative states such as Texas.
If succes…

California's top prosecutor floats path to boost Democrats in Congress
California Atty. Gen. Rob Bonta said Tuesday that he believes he has found a sound legal strategy to ask voters to tear up congressional boundaries created by the state’s independent redistricting commission.

Geometric Landau Analysis and Symbol Bootstrap
Dmitry Chicherin, Johannes Henn, Elia Mazzucchelli, Jaroslav Trnka, Qinglin Yang, Shun-Qing Zhang
https://arxiv.org/abs/2508.05443

Geometric Landau Analysis and Symbol Bootstrap
We investigate how the positive geometry framework for loop integrands in $\mathcal{N}{=}4$ super Yang-Mills theory constrains the structure of the integrated answers. This is done in the context of a geometric expansion of Wilson loops with a Lagrangian insertion, called negative geometries, extending ideas previously used for scattering amplitudes related to the Amplituhedron. The procedure we adopt combines the knowledge of all maximal codimension boundaries of the geometry, which characteri…

Towards Sharper Object Boundaries in Self-Supervised Depth Estimation
Aur\'elien Cecille, Stefan Duffner, Franck Davoine, R\'emi Agier, Thibault Neveu
https://arxiv.org/abs/2509.15987

Towards Sharper Object Boundaries in Self-Supervised Depth Estimation
Accurate monocular depth estimation is crucial for 3D scene understanding, but existing methods often blur depth at object boundaries, introducing spurious intermediate 3D points. While achieving sharp edges usually requires very fine-grained supervision, our method produces crisp depth discontinuities using only self-supervision. Specifically, we model per-pixel depth as a mixture distribution, capturing multiple plausible depths and shifting uncertainty from direct regression to the mixture w…

Guided Query Refinement: Multimodal Hybrid Retrieval with Test-Time Optimization
Omri Uzan, Asaf Yehudai, Roi pony, Eyal Shnarch, Ariel Gera
https://arxiv.org/abs/2510.05038 htt…

Guided Query Refinement: Multimodal Hybrid Retrieval with Test-Time Optimization
Multimodal encoders have pushed the boundaries of visual document retrieval, matching textual query tokens directly to image patches and achieving state-of-the-art performance on public benchmarks. Recent models relying on this paradigm have massively scaled the sizes of their query and document representations, presenting obstacles to deployment and scalability in real-world pipelines. Furthermore, purely vision-centric approaches may be constrained by the inherent modality gap still exhibited…

Assessing Human Rights Risks in AI: A Framework for Model Evaluation
Vyoma Raman, Camille Chabot, Betsy Popken
https://arxiv.org/abs/2510.05519 https://arx…

Assessing Human Rights Risks in AI: A Framework for Model Evaluation
The Universal Declaration of Human Rights and other international agreements outline numerous inalienable rights that apply across geopolitical boundaries. As generative AI becomes increasingly prevalent, it poses risks to human rights such as non-discrimination, health, and security, which are also central concerns for AI researchers focused on fairness and safety. We contribute to the field of algorithmic auditing by presenting a framework to computationally assess human rights risk. Drawing …

Active sorting to boundaries in active nematic -- passive isotropic fluid mixtures
Saraswat Bhattacharyya, Julia M. Yeomans
https://arxiv.org/abs/2509.01523 https://

Active sorting to boundaries in active nematic -- passive isotropic fluid mixtures
We use a two-fluid model to study a confined mixture of an active nematic fluid and a passive isotropic fluid. We find that an extensile active fluid preferentially accumulates at a boundary if the anchoring is planar, whereas its boundary concentration decreases for homeotropic anchoring. These tendencies are reversed if the active fluid is contractile. We argue that the sorting results from gradients in the nematic order, and show that the behaviour can be driven by either imposed boundary an…

Sharp boundary regularity properties for hypoelliptic kinetic equations
Yuzhe Zhu
https://arxiv.org/abs/2509.02536 https://arxiv.org/pdf/2509.02536

Sharp boundary regularity properties for hypoelliptic kinetic equations
We establish sharp boundary regularity results for solutions to kinetic Fokker-Planck equations under prescribed inflow boundary conditions, providing precise quantification of the boundary hypoelliptic regularization effect. For equations with rough coefficients, we characterize the behaviours for solutions on grazing and incoming boundaries. In particular, in the absence of influxes and sources, an explicit exponential infinite-order vanishing estimate is derived near incoming boundaries. Whe…

SwiReasoning: Switch-Thinking in Latent and Explicit for Pareto-Superior Reasoning LLMs
Dachuan Shi, Abedelkadir Asi, Keying Li, Xiangchi Yuan, Leyan Pan, Wenke Lee, Wen Xiao
https://arxiv.org/abs/2510.05069

SwiReasoning: Switch-Thinking in Latent and Explicit for Pareto-Superior Reasoning LLMs
Recent work shows that, beyond discrete reasoning through explicit chain-of-thought steps, which are limited by the boundaries of natural languages, large language models (LLMs) can also reason continuously in latent space, allowing richer information per step and thereby improving token efficiency. Despite this promise, latent reasoning still faces two challenges, especially in training-free settings: 1) purely latent reasoning broadens the search distribution by maintaining multiple implicit …

A Two-Gauge Field Model for Magnetoelectric Boundaries
F. A. Barone, H. L. Oliveira, J. P. Ferreira
https://arxiv.org/abs/2508.21697 https://arxiv.org/pdf/…

A Two-Gauge Field Model for Magnetoelectric Boundaries
This work introduces a field-theoretical model designed to simulate the presence of material layers with magnetoelectric properties. The model comprises the standard Maxwell field coupled to a Chern-Simons field confined to a planar layer. The electromagnetic behavior of the boundary is emulated through the interaction between the Chern-Simons and Maxwell fields, governed by two parameters: the Chern-Simons mass and the coupling constant between the fields. Both parameters can be adjusted to re…

A Non-Local Orientation Field Phase-Field Model for Misorientation- and Inclination- Dependent Grain Boundaries
Xiao Han, Axel van de Walle
https://arxiv.org/abs/2508.01688 http…

A Non-Local Orientation Field Phase-Field Model for Misorientation- and Inclination- Dependent Grain Boundaries
We propose to incorporate grain boundary (GB) anisotropy in phase-field modeling by extending the standard partial differential equations formulation to include a non-local functional of an orientation field. Regardless of the number of grains in the simulation, the model uses a single orientation field and incorporates grain misorientation and inclination information obtained from sampling the orientation field at optimized locations in the vicinity of the grain boundary. The formalism enables…

A community-driven optimization framework for redrawing school attendance boundaries
Hongzhao Guan, Paul Riggins, Tyler Simko, Jasmine Mangat, Cassandra Moe, Urooj Haider, Frank Pantano, Effie G. McMillian, Genevieve Siegel-Hawley, Pascal Van Hentenryck, Nabeel Gillani
https://arxiv.org/abs/2509.17130

A community-driven optimization framework for redrawing school attendance boundaries
The vast majority of US public school districts use school attendance boundaries to determine which student addresses are assigned to which schools. Existing work shows how redrawing boundaries can be a powerful policy lever for increasing access and opportunity for historically disadvantaged groups, even while maintaining other priorities like minimizing driving distances and preserving existing social ties between students and families. This study introduces a multi-objective algorithmic scho…

Emergence of run-and-tumble-like swimming in self-propelling artificial swimmers in soft microchannels
Smita S. Sontakke, Aneesha Kajampady, Mohd Suhail Rizvi, Ranabir Dey
https://arxiv.org/abs/2508.04443

Emergence of run-and-tumble-like swimming in self-propelling artificial swimmers in soft microchannels
Biological microswimmers often encounter deformable boundaries in physiological conditions; for instance, the viscoelastic walls of reproductive tract during migration of spermatozoa, or host tissue during early bacterial biofilm formation. However, the combined influence of elastic and hydrodynamic cues on microswimmer dynamics is poorly understood. Here, we experimentally investigate how the softness of microchannel walls affects the swimming characteristics of self-propelling microswimmers, …

Impact of porous media heterogeneity on convective mixing in a Rayleigh-B\'enard instability
Rima Benhammadi, Juan J. Hidalgo
https://arxiv.org/abs/2508.04342 https://

Impact of porous media heterogeneity on convective mixing in a Rayleigh-Bénard instability
This work studies the effect of the heterogeneity of a porous medium on convective mixing. We consider a system where a Rayleigh-Bénard instability is triggered by a temperature difference between the top and bottom boundaries. Heterogeneity is represented by multi-Gaussian log-normally distributed permeability fields. We explore the effect of the Rayleigh number, the variance and correlation length of the log-permeability field on the fingering patterns, heat flux, mixing state and flow struc…

Ordinal Adaptive Correction: A Data-Centric Approach to Ordinal Image Classification with Noisy Labels
Alireza Sedighi Moghaddam, Mohammad Reza Mohammadi
https://arxiv.org/abs/2509.02351

Ordinal Adaptive Correction: A Data-Centric Approach to Ordinal Image Classification with Noisy Labels
Labeled data is a fundamental component in training supervised deep learning models for computer vision tasks. However, the labeling process, especially for ordinal image classification where class boundaries are often ambiguous, is prone to error and noise. Such label noise can significantly degrade the performance and reliability of machine learning models. This paper addresses the problem of detecting and correcting label noise in ordinal image classification tasks. To this end, a novel data…

Thermodynamically driven tilt grain boundaries of monolayer crystals using catalytic liquid alloys
Min-Yeong Choi, Chang-Won Choi, Dong-Yeong Kim, Moon-Ho Jo, Yong-Sung Kim, Si-Young Choi, Cheol-Joo Kim
https://arxiv.org/abs/2507.22689

Thermodynamically driven tilt grain boundaries of monolayer crystals using catalytic liquid alloys
We report a method to precisely control the atomic defects at grain boundaries (GBs) of monolayer MoS2 by vapor-liquid-solid (VLS) growth using sodium molybdate liquid alloys, which serve as growth catalysts to guide the formations of the thermodynamically most stable GB structure. The Mo-rich chemical environment of the alloys results in Mo-polar 5|7 defects with a yield exceeding 95%. The photoluminescence (PL) intensity of VLS-grown polycrystalline MoS2 films markedly exceeds that of th…

Entanglement Entropy in Jackiw-Teitelboim de Sitter gravity with Timelike Boundaries
Timofei Rusalev
https://arxiv.org/abs/2509.12975 https://arxiv.org/pdf…

Entanglement Entropy in Jackiw-Teitelboim de Sitter gravity with Timelike Boundaries
The consideration of timelike boundaries in de Sitter static patches has a broad motivation, such as the formulation of a well-defined canonical ensemble and the realization of a natural framework for static patch holography. In this work we study Jackiw-Teitelboim de Sitter gravity with symmetric timelike reflecting boundaries, which, in the presence of both cosmological and "black hole" horizons, naturally separate the spacetime into a "black hole system" and a "cosmological system". We apply…

Optimization of Ab-Initio Based Tight-Binding Models
Henrik Dick, Thomas Dahm
https://arxiv.org/abs/2508.04861 https://arxiv.org/pdf/2508.04861

Optimization of Ab-Initio Based Tight-Binding Models
The electronic structure of solids can routinely be calculated by standard methods like density functional theory. However, in complicated situations like interfaces, grain boundaries or contact geometries one needs to resort to more simplified models of the electronic structure. Tight-binding models are using a reduced set of orbitals and aim to approximate the electronic structure by short range hopping processes. For example, maximally localized Wannier functions are often used for that purp…

Better Language Model-Based Judging Reward Modeling through Scaling Comprehension Boundaries
Meiling Ning, Zhongbao Zhang, Junda Ye, Jiabao Guo, Qingyuan Guan
https://arxiv.org/abs/2508.18212

Better Language Model-Based Judging Reward Modeling through Scaling Comprehension Boundaries
The emergence of LM-based judging reward modeling, represented by generative reward models, has successfully made reinforcement learning from AI feedback (RLAIF) efficient and scalable. To further advance this paradigm, we propose a core insight: this form of reward modeling shares fundamental formal consistency with natural language inference (NLI), a core task in natural language understanding. This reframed perspective points to a key path for building superior reward models: scaling the mod…

Quantum corrected black hole microstates and entropy
Dongming He, Juan Hernandez, Maria Knysh
https://arxiv.org/abs/2510.02997 https://arxiv.org/pdf/2510.0…

Quantum corrected black hole microstates and entropy
We extend the semiclassical black hole microstate construction to include quantum corrections to the microscopic entropy using a doubly holographic model of black holes. Specifically, we consider a double-sided black hole on a JT brane with holographic matter, coupled to a pair of holographic CFTs on the asymptotic boundaries. The dimension of the Hilbert space spanned by the microstates of this doubly holographic black hole is given by the exponentiated entropy, which is equal to the sum of th…

Dislocation interaction with a tilt low angle grain boundary in bi-crystal SrTiO3
Kuan Ding, Atsutomo Nakamura, Patrick Cordier, Xufei Fang
https://arxiv.org/abs/2509.04893 http…

Dislocation interaction with a tilt low angle grain boundary in bi-crystal SrTiO3
For potentially wider applications of ceramics with dislocation-tuned mechanical and functional properties, it is pertinent to achieve dislocation engineering in polycrystalline ceramics. However, grain boundaries (GBs) in general are effective barriers for dislocation glide and often result in crack formation when plastic deformation in ceramics is attempted at room temperature. To develop strategies for crack suppression, it is critical to understand the fundamental processes for dislocation-…

Do LVLMs Know What They Know? A Systematic Study of Knowledge Boundary Perception in LVLMs
Zhikai Ding, Shiyu Ni, Keping Bi
https://arxiv.org/abs/2508.19111 https://

Do LVLMs Know What They Know? A Systematic Study of Knowledge Boundary Perception in LVLMs
Large vision-language models (LVLMs) demonstrate strong visual question answering (VQA) capabilities but are shown to hallucinate. A reliable model should perceive its knowledge boundaries-knowing what it knows and what it does not. This paper investigates LVLMs' perception of their knowledge boundaries by evaluating three types of confidence signals: probabilistic confidence, answer consistency-based confidence, and verbalized confidence. Experiments on three LVLMs across three VQA datasets sh…

Domain Boundaries in a Metallic Distortive Polar Metal
Adrian Savovici, Barak Ratzker, Xuyang Zhou, Stefan Zaefferer, Martina Ruffino, Iliya Radulov, Patricia Jovi\v{c}evi\'c-Klug, Shyam Katnagallu, Amir Hamzehei, Philipp Watermeyer, Alexandra Vogel, J\"org Neugebauer, Christoph Freysoldt, Dierk Raabe
https://arxiv.org/abs/2509.23…

Domain Boundaries in a Metallic Distortive Polar Metal
Polar metals are an underexplored material class combining two properties that are typically incompatible, namely a polar crystal structure and reasonable electrical conductivity. While intriguing given that metals favor centrosymmetry, these materials also exhibit potential functional properties relevant to memory, optoelectronic, catalytic, and other applications. The distortive polar metal (DPM) subclass forms through a centrosymmetry-lifting phase transformation into a polar crystal structu…