Tootfinder

Justice minister: Ukraine willing to accept loans if necessary to secure US aid: https://benborges.xyz/2024/03/13/justice-minister-ukraine.html

Necessary conditions for turnpike property for generalized linear-quadratic problems
Roberto Guglielmi, Zhuqing Li
https://arxiv.org/abs/2403.08958 https:/…

Necessary conditions for turnpike property for generalized linear-quadratic problems
In this paper, we develop several necessary conditions of turnpike property for generalizaid linear-quadratic (LQ) optimal control problem in infinite dimensional setting. The term 'generalized' here means that both quadratic and linear terms are considered in the running cost. The turnpike property reflects the fact that over a sufficiently large time horizon, the optimal trajectories and optimal controls stay for most of the time close to a steady state of the system. We show that the turnpik…

"University presidents] are generally expert managers. Many also have the capacity to charm donors. They are less likely to be practiced politicians..."
Yes. Great piece on what universities need to do in the age of the Trumpified GOP.
https://www.chronicle.com/article/if-trump

Opinion | Trump and His Allies Are Preparing to Overhaul Higher Education
The sector isn’t prepared to defend itself.

"But the ruling comes with an exception—noting that she’ll still consider measures filed at the eleventh hour if the legal teams can prove they’re necessary."
Of course it does 😒
https://newrepublic.com/post/179061/ju

Judge Cannon—Yes, Judge Cannon!—Just Shot Down a Trump Delay Tactic
The Trump-appointed judge said the trial will move forward as planned, for now.

The classic Amazon/CIA scam...
https://www.thecut.com/article/amazon-scam-call-ftc-arrest-warrants.html
"NY Mag's personal finance columnist was convinced by a cold caller claiming to be a CIA agent in Langley that she needed to e…

In a world overflowing with information, how can we adapt our learning methods to thrive?
Dave Cormier, a pioneering figure in digital education, presents a thought-provoking manifesto in "Learning in a Time of Abundance".
Measuring knowledge through memorization and grades made more sense in a world where information was hard to come by.
Cormier explores the cultural and teaching changes necessary to adapt in the digital age while emphasizing the importance of …

The kids got so many treats yesterday at school for the Valentine's day. I don't know man, I feel like we have lost it with all the trash gifting that's going on. The teacher posted a pile of chocolates she received and I just can't help and wonder is this truly necessary? I usually leave the teacher gift part for the end of the year. But all these holidays in between, it's too much. I brought in V-day cards for our kindergarten kid, and nothing else for the other two.

Why Macron is harshly criticized by French parties and media for his position on Ukraine?: https://benborges.xyz/2024/03/16/why-macron-is.html

Feel it necessary to post this again after our game posts are getting spam reports
We normally post one post per day that players across the Fediverse play from their own instance. That is not spam
We don't control the game trending in your instance's Explore algorithm, nor can we moderate your instance for game plays that should contain a CW or other tag
99.99% of game players DO use the universal hashtag

The Vienna Architecture Description Language
Simon Himmelbauer, Christoph Hochrainer, Benedikt Huber, Niklas Mischkulnig, Philipp Paulweber, Tobias Schwarzinger, Andreas Krall
https://arxiv.org/abs/2402.09087

The Vienna Architecture Description Language
The Vienna Architecture Description Language (VADL) is a powerful processor description language (PDL) that enables the concise formal specification of processor architectures. By utilizing a single VADL processor specification, the VADL system exhibits the capability to automatically generate a range of artifacts necessary for rapid design space exploration. These include assemblers, compilers, linkers, functional instruction set simulators, cycle-accurate instruction set simulators, synthesiz…

I think people underestimate what the impact will be of an AI companion, at the current GPT4 level , that you can talk with without a lag of several seconds, that you can personalise, that has memory etc. GPT5 isn't necessary to change the landscape and impact of AI.
#AI #ChatGPT

Edge coloring lattice graphs
Joris Kattem\"olle
https://arxiv.org/abs/2402.08752 https://arxiv.org/pdf/2402.08752

Edge coloring lattice graphs
We develop the theory of the edge coloring of infinite lattice graphs, proving a necessary and sufficient condition for a proper edge coloring of a patch of a lattice graph to induce a proper edge coloring of the entire lattice graph by translation. This condition forms the cornerstone of a method that finds nearly minimal or minimal edge colorings of infinite lattice graphs. In case a nearly minimal edge coloring is requested, the running time is $O(μ^2 D^4)$, where $μ$ is the number of edge…

Will Zionism survive the war?

As Israel marks its 76th anniversary this week under the shadow of the Oct. 7 massacre and the Israel-Gaza war, the country’s underlying Zionist ideology is being called into question.
Various groups distort and weaponize the term “Zionism,” depicting it as a malignant form of tribalism or even racism.
To understand current developments in Israel, as well as the country’s tumultuous history, it is necessary to clarify what Zionism has reall…

Will Zionism survive the war?
As Israel marks its Independence Day, the nation’s Zionist ideology faces hard questions.

Safe Planning for Articulated Robots Using Reachability-based Obstacle Avoidance With Spheres
Jonathan Michaux, Adam Li, Qingyi Chen, Che Chen, Bohao Zhang, Ram Vasudevan
https://arxiv.org/abs/2402.08857

Safe Planning for Articulated Robots Using Reachability-based Obstacle Avoidance With Spheres
Generating safe motion plans in real-time is necessary for the wide-scale deployment of robots in unstructured and human-centric environments. These motion plans must be safe to ensure humans are not harmed and nearby objects are not damaged. However, they must also be generated in real-time to ensure the robot can quickly adapt to changes in the environment. Many trajectory optimization methods introduce heuristics that trade-off safety and real-time performance, which can lead to potentially …

This is some janky carpentry right here
I made a rig to hold a projector above our gaming table at the correct - and extreme - height necessary to get the 16x9 screen to fill a goodly sized area. I'm gonna add some guy wires to the table legs and maybe another clamp.
https://www.youtube.com/watch?v=jYvlMt9pjng

This https://arxiv.org/abs/2306.15085 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Note on Extension Properties and Representations of Matroids
We discuss several extension properties of matroids and polymatroids and their application as necessary conditions for the existence of different matroid representations, namely linear, folded linear, algebraic, and entropic representations. Iterations of those extension properties are checked for matroids on eight and nine elements by means of computer-aided explorations, finding in that way several new examples of non-linearly representable matroids. A special emphasis is made on sparse pavin…

@… I don't know. I tend to think that the best approach, if necessary, would be to plant plants that are native to areas that are adjacent. For example, I live in Washington DC. I now assume that plants native to Virginia and North Carolina are suitable to DC.

This https://arxiv.org/abs/2310.12544 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Neural Likelihood Approximation for Integer Valued Time Series Data
Stochastic processes defined on integer valued state spaces are popular within the physical and biological sciences. These models are necessary for capturing the dynamics of small systems where the individual nature of the populations cannot be ignored and stochastic effects are important. The inference of the parameters of such models, from time series data, is challenging due to intractability of the likelihood. To work at all, current simulation based inference methods require the generation…

Optimistic Verifiable Training by Controlling Hardware Nondeterminism
Megha Srivastava, Simran Arora, Dan Boneh
https://arxiv.org/abs/2403.09603 https://…

Optimistic Verifiable Training by Controlling Hardware Nondeterminism
The increasing compute demands of AI systems has led to the emergence of services that train models on behalf of clients lacking necessary resources. However, ensuring correctness of training and guarding against potential training-time attacks, such as data poisoning, poses challenges. Existing works on verifiable training largely fall into two classes: proof-based systems, which struggle to scale due to requiring cryptographic techniques, and "optimistic" methods that consider a trusted third…

EU countries reach a compromise deal on gig economy workers' rights, breaking a logjam by letting states make decisions; EU Parliament and members must approve (Max Ramsay/Bloomberg)
https://www.bloomberg.com/news/articles/20

EU Reaches Breakthrough on Rules for Uber, Deliveroo Gig Workers
European Union countries reached a breakthrough Monday on planned rules over workers’ rights in the gig economy, after EU member states reached the necessary majority to move ahead with the regulation, according to a post by the Belgian government on the X platform.

This https://arxiv.org/abs/2305.04079 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDC_…

An Empirical Study on Governance in Bitcoin's Consensus Evolution
Blockchain systems run consensus rules as code to agree on the state of the distributed ledger and secure the network. Changing these rules can be risky and challenging. In addition, it can often be controversial and take much effort to make all the necessary participants agree to adopt a change. Arguably, Bitcoin has seen centralisation tendencies in pools and in development. However, how these tendencies influence blockchain governance has received minimal community and academic attention. Ou…

Which Artificial Intelligences Do People Care About Most? A Conjoint Experiment on Moral Consideration
Ali Ladak, Jamie Harris, Jacy Reese Anthis
https://arxiv.org/abs/2403.09405 …

Which Artificial Intelligences Do People Care About Most? A Conjoint Experiment on Moral Consideration
Many studies have identified particular features of artificial intelligences (AI), such as their autonomy and emotion expression, that affect the extent to which they are treated as subjects of moral consideration. However, there has not yet been a comparison of the relative importance of features as is necessary to design and understand increasingly capable, multi-faceted AI systems. We conducted an online conjoint experiment in which 1,163 participants evaluated descriptions of AIs that varie…

This https://arxiv.org/abs/2307.13032 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

One-shot holography
Following the work of [2008.03319], we define a generally covariant max-entanglement wedge of a boundary region $B$, which we conjecture to be the bulk region reconstructible from $B$. We similarly define a covariant min-entanglement wedge, which we conjecture to be the bulk region that can influence the state on $B$. We prove that the min- and max-entanglement wedges obey various properties necessary for this conjecture, such as nesting, inclusion of the causal wedge, and a reduction to the us…

Galois Self-dual 2-quasi Constacyclic Codes over Finite Fields
Yun Fan, Yue Leng
https://arxiv.org/abs/2404.08402 https://arxiv.org/p…

Galois Self-dual 2-quasi Constacyclic Codes over Finite Fields
Let $F$ be a field with cardinality $p^\ell$ and $0\neq λ\in F$, and $0\le h<\ell$. Extending Euclidean and Hermitian inner products, Fan and Zhang introduced Galois $p^h$-inner product (DCC, vol.84, pp.473-492). In this paper, we characterize the structure of $2$-quasi $λ$-constacyclic codes over $F$; and exhibit necessary and sufficient conditions for $2$-quasi $λ$-constacyclic codes being Galois self-dual. With the help of a technique developed in this paper, we prove that, when $\ell$ is…

This https://arxiv.org/abs/2402.01860 has been replaced.
link: https://scholar.google.com/scholar?q=a

Outlier Accommodation for GNSS Precise Point Positioning using Risk-Averse State Estimation
Reliable and precise absolute positioning is necessary in the realm of Connected Automated Vehicles (CAV). Global Navigation Satellite Systems (GNSS) provides the foundation for absolute positioning. Recently enhanced Precise Point Positioning (PPP) technology now offers corrections for GNSS on a global scale, with the potential to achieve accuracy suitable for real-time CAV applications. However, in obstructed sky conditions, GNSS signals are often affected by outliers; therefore, addressing o…

Superphot : Realtime Fitting and Classification of Supernova Light Curves
Kaylee M. de Soto (Center for Astrophysics | Harvard & Smithsonian), Ashley Villar (Center for Astrophysics | Harvard & Smithsonian), Edo Berger (Center for Astrophysics | Harvard & Smithsonian, The NSF AI Institute for Artificial Intelligence and Fundamental Interactions), Sebastian Gomez (Space Telescope Science Institute), Griffin Hosseinzadeh (Steward Observatory | University of Arizona), Doug Bra…

Superphot+: Realtime Fitting and Classification of Supernova Light Curves
Photometric classifications of supernova (SN) light curves have become necessary to utilize the full potential of large samples of observations obtained from wide-field photometric surveys, such as the Zwicky Transient Facility (ZTF) and the Vera C. Rubin Observatory. Here, we present a photometric classifier for SN light curves that does not rely on redshift information and still maintains comparable accuracy to redshift-dependent classifiers. Our new package, Superphot+, uses a parametric mod…

Ergodicity demystifies fast neutrino flavor instability
Lucas Johns
https://arxiv.org/abs/2402.08896 https://arxiv.org/pdf/2402.08896…

Ergodicity demystifies fast neutrino flavor instability
Flavor ergodicity implies that angular crossings are necessary and sufficient for fast instability.

Large-Scale Multi-Domain Recommendation: an Automatic Domain Feature Extraction and Personalized Integration Framework
Dongbo Xi, Zhen Chen, Yuexian Wang, He Cui, Chong Peng, Fuzhen Zhuang, Peng Yan
https://arxiv.org/abs/2404.08361

Large-Scale Multi-Domain Recommendation: an Automatic Domain Feature Extraction and Personalized Integration Framework
Feed recommendation is currently the mainstream mode for many real-world applications (e.g., TikTok, Dianping), it is usually necessary to model and predict user interests in multiple scenarios (domains) within and even outside the application. Multi-domain learning is a typical solution in this regard. While considerable efforts have been made in this regard, there are still two long-standing challenges: (1) Accurately depicting the differences among domains using domain features is crucial fo…

This https://arxiv.org/abs/2402.07965 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Extension of Theory of Gravitomagnetism and Spinor Quantum Mechanics with Dynamics of Free Electromagnetic Field
The theory of Gravitomagnetism and spinor quantum mechanics describing the interaction between the Dirac spinor field, the electromagnetic field, and a weak gravitational field is extended by including the Lagrangian density of the free electromagnetic field. It is shown that the newly added term in the Lagrangian density is necessary to restore a symmetric energy-momentum tensor in the interaction term of the Lagrangian density within the theory. We prove that when the electromagnetic energy t…

Randomized Principal Component Analysis for Hyperspectral Image Classification
Mustafa Ustuner
https://arxiv.org/abs/2403.09117 https://

Randomized Principal Component Analysis for Hyperspectral Image Classification
The high-dimensional feature space of the hyperspectral imagery poses major challenges to the processing and analysis of the hyperspectral data sets. In such a case, dimensionality reduction is necessary to decrease the computational complexity. The random projections open up new ways of dimensionality reduction, especially for large data sets. In this paper, the principal component analysis (PCA) and randomized principal component analysis (R-PCA) for the classification of hyperspectral images…

A Game Theoretic Approach to Sustainizability Over Sets and its application to a multi-species population model
Ioannis V. Manousiouthakis (Department of Chemical,Biomolecular Engineering, Hydrogen Engineering Research Consortium)
https://arxiv.org/abs/2403.08981

A Game Theoretic Approach to Sustainizability Over Sets and its application to a multi-species population model
In this work, a theorem is first proved which presents a game theoretic formulation of a necessary and sufficient sustainizability over a set condition for a general system described by ordinary differential equations (ODEs). Then, two additional theorems are proved for the n-species Gause-Lotka-Volterra (GLV) population model, establishing necessary and sufficient sustainability and sustainizability conditions over rectangular sets. Three case studies on the May-Leonard, 3-species, GLV model a…

"The central question that arises from this is of a constitutional nature, and is, in jurisprudential terms, as fascinating as it is new: is it acceptable, necessary even, to break the law in order to restore the rule of law?" - @…

If I still had the attention span necessary to read long-form writing, something on my reading archive might be: more Robert Owen

Will Zionism survive the war?

As Israel marks its 76th anniversary this week under the shadow of the Oct. 7 massacre and the Israel-Gaza war, the country’s underlying Zionist ideology is being called into question.
Various groups distort and weaponize the term “Zionism,” depicting it as a malignant form of tribalism or even racism.
To understand current developments in Israel, as well as the country’s tumultuous history, it is necessary to clarify what Zionism has reall…

Will Zionism survive the war?
As Israel marks its Independence Day, the nation’s Zionist ideology faces hard questions.

Multi-Step Traffic Prediction for Multi-Period Planning in Optical Networks
Hafsa Maryam, Tania Panayiotou, Georgios Ellinas
https://arxiv.org/abs/2404.08314

Multi-Step Traffic Prediction for Multi-Period Planning in Optical Networks
A multi-period planning framework is proposed that exploits multi-step ahead traffic predictions to address service overprovisioning and improve adaptability to traffic changes, while ensuring the necessary quality-of-service (QoS) levels. An encoder-decoder deep learning model is initially leveraged for multi-step ahead prediction by analyzing real-traffic traces. This information is then exploited by multi-period planning heuristics to efficiently utilize available network resources while min…

This https://arxiv.org/abs/2204.06068 has been replaced.
link: https://scholar.google.com/scholar?q=a

Encodability Criteria for Quantum Based Systems
Quantum based systems are a relatively new research area for that different modelling languages including process calculi are currently under development. Encodings are often used to compare process calculi. Quality criteria are used then to rule out trivial or meaningless encodings. In this new context of quantum based systems, it is necessary to analyse the applicability of these quality criteria and to potentially extend or adapt them. As a first step, we test the suitability of classical cr…

Bubble breakup probability in turbulent flows
Ali\'enor Rivi\`ere, St\'ephane Perrard
https://arxiv.org/abs/2403.08684 https://

Bubble breakup probability in turbulent flows
Bubbles drive gas and chemical transfers in various industrial and geophysical context, in which flows are typically turbulent. A knowledge of the bubble size distributions is then necessary to quantify mass fluxes across interfaces. In a turbulent flow, every bubble might break, depending on both the ratio between inertial and capillary forces at its scale, namely the Weber number We. For inhomogeneous and unstationary flows, the residence time within a turbulent region will also determine the…

Another covid erasure rant
Also from conversations at the dentist: staff don't test themselves regularly any more, but they do if they have respiratory symptoms!
There's a giant list of possible covid symptoms besides those! Like headache for example! Are we in a timewarp back to spring 2020?
It's really up in my face right now how weird the world is nowadays. No longer medical professionals' jobs to know even the basic facts necessary for infection control.
#CovidErasure #covid

Mixed feelings about this, but it’s probably necessary for Biden to get re elected. https://finance.yahoo.com/news/big-oil-is-doing-way-better-under-biden-than-under-trump-142434637.html

This https://arxiv.org/abs/2312.13199 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

An improved Halo Occupation Distribution prescription from UNITsim H_alpha Emission Line Galaxies: conformity and modified radial profile
Emission line galaxies (ELGs) are targeted by the new generation of spectroscopic surveys to make unprecedented measurements in cosmology from their distribution. Accurately interpreting this data requires understanding the imprints imposed by the physics of galaxy formation and evolution on galaxy clustering. In this work we utilize a semi-analytical model of galaxy formation (SAGE) to explore the necessary components for accurately reproducing the clustering of ELGs. We focus on developing a …

Man, honestly I really hope quantum kills everything we know today about key exchange. Imagine the level of necessary research this would spawn. No more bullshit, just focusing on saving humanity as we know it. Stuff that matters. Like back before when we had secure messaging.

This https://arxiv.org/abs/2310.11969 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Survey calibration for causal inference: a simple method to balance covariate distributions
This paper proposes a~simple, yet powerful, method for balancing distributions of covariates for causal inference based on observational studies. The method makes it possible to balance an arbitrary number of quantiles (e.g., medians, quartiles, or deciles) together with means if necessary. The proposed approach is based on the theory of calibration estimators (Deville and Särndal 1992), in particular, calibration estimators for quantiles, proposed by Harms and Duchesne (2006). The method does…

On locally symmetric polynomial metrics: Riemannian and Finslerian surfaces
Csaba Vincze, M\'ark Ol\'ah, \'Abris Nagy
https://arxiv.org/abs/2403.09633

On locally symmetric polynomial metrics: Riemannian and Finslerian surfaces
In the paper we investigate locally symmetric polynomial metrics in special cases of Riemannian and Finslerian surfaces. The Riemannian case will be presented by a collection of basic results (regularity of second root metrics) and formulas up to Gauss curvature. In case of Finslerian surfaces we formulate necessary and sufficient conditions for a locally symmetric fourth root metric in 2D to be positive definite. They are given in terms of the coefficients of the polynomial metric to make chec…

Dear Disney - F.U.
This says a lot about you as a company, when you think cutting the awarding of an important prize to a film talking about tragedy is somehow necessary.
https://mastodon.ie/@EugeneMcParland/112081467005772272

Ended up calling the police on my ex wife on Wednesday. I’ve never called the police before. I wish it wasn’t necessary. Hoping that she’ll stick to the shared parenting arrangements now, however I think it will just have upped the ante. Pretty certain it will all have to go to a judge in due course. You’d think it was pretty reasonable for a dad to have his kids over for 2 nights a week without any drama from her, wouldn’t you?

MAMMOTH: Massively Multilingual Modular Open Translation @ Helsinki
Timothee Mickus, Stig-Arne Gr\"onroos, Joseph Attieh, Michele Boggia, Ona De Gibert, Shaoxiong Ji, Niki Andreas Lopi, Alessandro Raganato, Ra\'ul V\'azquez, J\"org Tiedemann
https://arxiv.org/abs/2403.07544…

MAMMOTH: Massively Multilingual Modular Open Translation @ Helsinki
NLP in the age of monolithic large language models is approaching its limits in terms of size and information that can be handled. The trend goes to modularization, a necessary step into the direction of designing smaller sub-networks and components with specialized functionality. In this paper, we present the MAMMOTH toolkit: a framework designed for training massively multilingual modular machine translation systems at scale, initially derived from OpenNMT-py and then adapted to ensure effici…

Optimizing image enhancement: feature engineering for improved classification in #AI-assisted artificial retinas https://www.mdpi.com/1424-8220/24/9/2678 "enhancing images such that only the major objec…

Optimizing Image Enhancement: Feature Engineering for Improved Classification in AI-Assisted Artificial Retinas
Artificial retinas have revolutionized the lives of many blind people by enabling their ability to perceive vision via an implanted chip. Despite significant advancements, there are some limitations that cannot be ignored. Presenting all objects captured in a scene makes their identification difficult. Addressing this limitation is necessary because the artificial retina can utilize a very limited number of pixels to represent vision information. This problem in a multi-object scenario can be m…

21cm signal from Dark Ages collapsing halos with detailed molecular cooling treatment
Hugo Plombat, Denis Puy
https://arxiv.org/abs/2404.08479 https://

21cm signal from Dark Ages collapsing halos with detailed molecular cooling treatment
Context. In order to understand the formation of the first stars, which set the transition between the Dark Ages and Cosmic Dawn epochs, it is necessary to provide a detailed description of the physics at work within the first clouds of gas which, during their gravitational collapse, will set the conditions for stars to be form through the mechanism of thermal instability. Aims. Our objective is to study in detail the molecular cooling of gas in the halos preceding the formation of the first …

Adaptive Anomaly Detection Disruption Prediction Starting from First Discharge
Xinkun Ai, Wei Zheng, Ming Zhang, Yonghua Ding, Dalong Chen, Zhongyong Chen, Bihao Guo, Chengshuo Shen, Nengchao Wang, Zhoujun Yang, Zhipeng Chen, Yuan Pan, Biao Shen, Binjia Xiao
https://arxiv.org/abs/2404.08241<…

Adaptive Anomaly Detection Disruption Prediction Starting from First Discharge
Plasma disruption presents a significant challenge in tokamak fusion, where it can cause severe damage and economic losses. Current disruption predictors mainly rely on data-driven methods, requiring extensive discharge data for training. However, future tokamaks require disruption prediction from the first shot, posing challenges of data scarcity during the early operation period. In this period disruption prediction aims to support safe exploration of operation range and accumulate necessary …

I freely admit that the pronouns thing avoids me to a large degree. I can easily accept that it's necessary to use the right pronoun if it's known when talking about someone in the third person and I have used 'they' when talking about those I don't know since a child, probably for 60 years.
But in talking to someone directly I'm not going to use the third person or even think about it because it would be rude to use it when talking to them.
I've no …

This https://arxiv.org/abs/2307.10369 has been replaced.
initial toot: https://mastoxiv.page/@a…

Enumeration and representation theory of spin space groups
Those fundamental physical properties, such as phase transitions, Weyl fermions, and spin excitation, in all magnetic ordered materials, were ultimately believed to rely on the symmetry theory of magnetic space groups. Recently, it has come to light that a more comprehensive group, known as the spin space group (SSG), which combines separate spin and spatial operations, is necessary to fully characterize the geometry and underlying properties of magnetic ordered materials. However, the basic th…

This https://arxiv.org/abs/2403.07658 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

An overdetermined problem in 2D linearised hydrostatics
In two spatial dimensions, we discuss the relation between the solvability of Schiffer's overdetermined problem and the optimality, among sets of prescribed area, of the first eigenvalue in the buckling problem for a clamped plate and that of the first eigenvalue of the Stokes operator. For the latter, we deduce that the minimisers under area constraint that are smooth and simply connected must be discs from the fact that a pressureless velocity is a necessary condition of optimality.

This https://arxiv.org/abs/2305.04174 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Root-n consistent semiparametric learning with high-dimensional nuisance functions under minimal sparsity
Treatment effect estimation under unconfoundedness is a fundamental task in causal inference. In response to the challenge of analyzing high-dimensional datasets collected in substantive fields such as epidemiology, genetics, economics, and social sciences, many methods for treatment effect estimation with high-dimensional nuisance parameters (the outcome regression and the propensity score) have been developed in recent years. However, it is still unclear what is the necessary and sufficient s…

This https://arxiv.org/abs/2310.12544 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Neural Likelihood Approximation for Integer Valued Time Series Data
Stochastic processes defined on integer valued state spaces are popular within the physical and biological sciences. These models are necessary for capturing the dynamics of small systems where the individual nature of the populations cannot be ignored and stochastic effects are important. The inference of the parameters of such models, from time series data, is challenging due to intractability of the likelihood. To work at all, current simulation based inference methods require the generation…

EU countries reach a compromise deal on gig economy workers' rights, breaking a logjam by letting states make decisions; EU Parliament and members must approve (Max Ramsay/Bloomberg)
https://www.bloomberg.com/news/articles/20

EU Reaches Breakthrough on Rules for Uber, Deliveroo Gig Workers
European Union countries reached a breakthrough Monday on planned rules over workers’ rights in the gig economy, after EU member states reached the necessary majority to move ahead with the regulation, according to a post by the Belgian government on the X platform.

Springer correspondence and mirror symmetries for parabolic Hitchin systems
Bin Wang, Xueqing Wen, Yaoxiong Wen
https://arxiv.org/abs/2403.07552 https://…

Springer correspondence and mirror symmetries for parabolic Hitchin systems
We prove the Strominger--Yau--Zaslow and topological mirror symmetries for parabolic Hitchin systems of types B and C. In contrast to type A, a geometric reinterpretation of Springer duality is necessary. Furthermore, unlike Hitchin's construction in the non-parabolic case, the map between generic fibers in type B and C needs more analysis due to the change of partitions of Springer dual nilpotent orbits, which is the main difficulty in this article. To tackle this challenge, we first construct…

Colin McGinn || Is Causation Necessary?
https://www.colinmcginn.net/is-causation-necessary/?utm_source=rss&utm_medium=rss&utm_campaign=is-causation-necessary

Light industry. Even in the shiniest cosmopolitan cities, there are thousands of quotidian workplaces down back streets where necessary shit happens even though the shiny people never see them.
#photography

Lightweight Cryptanalysis of IoT Encryption Algorithms : Is Quota Sampling the Answer?
Jonathan Cook, Sabih ur Rehman, M. Arif Khan
https://arxiv.org/abs/2404.08165

Lightweight Cryptanalysis of IoT Encryption Algorithms : Is Quota Sampling the Answer?
Rapid growth in the number of small sensor devices known as the Internet of Things (IoT) has seen the development of lightweight encryption algorithms. Two well-known lightweight algorithms are SIMON and SIMECK which have been specifically designed for use on resource-constrained IoT devices. These lightweight encryption algorithms are based on the efficient Feistel block structure which is known to exhibit vulnerabilities to differential cryptanalysis. Consequently, it is necessary to test the…

This https://arxiv.org/abs/2303.15345 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Spectrum of the Laplacian with mixed boundary conditions in a chamfered quarter of layer
We investigate the spectrum of a Laplace operator with mixed boundary conditions in an unbounded chamfered quarter of layer. This problem arises in the study of the spectrum of the Dirichlet Laplacian in thick polyhedral domains having some symmetries such as the so-called Fichera layer. The geometry we consider depends on two parameters gathered in some vector $κ=(κ_1,κ_2)$ which characterizes the domain at the edges. By exchanging the axes and/or modifying their orientations if necessary, …

This https://arxiv.org/abs/2211.08929 has been replaced.
link: https://scholar.google.com/scholar?q=a

The Liouville theorem for a class of Fourier multipliers and its connection to coupling
The classical Liouville property says that all bounded harmonic functions in $\mathbb{R}^n$, i.e.\ all bounded functions satisfying $Δf = 0$, are constant. In this paper we obtain necessary and sufficient conditions on the symbol of a Fourier multiplier operator $m(D)$, such that the solutions $f$ to $m(D)f=0$ are Lebesgue a.e.\ constant (if $f$ is bounded) or coincide Lebesgue a.e.\ with a polynomial (if $f$ grows like a polynomial). The class of Fourier multipliers includes the (in general n…

This https://arxiv.org/abs/2402.01860 has been replaced.
link: https://scholar.google.com/scholar?q=a

Outlier Accommodation for GNSS Precise Point Positioning using Risk-Averse State Estimation
Reliable and precise absolute positioning is necessary in the realm of Connected Automated Vehicles (CAV). Global Navigation Satellite Systems (GNSS) provides the foundation for absolute positioning. Recently enhanced Precise Point Positioning (PPP) technology now offers corrections for GNSS on a global scale, with the potential to achieve accuracy suitable for real-time CAV applications. However, in obstructed sky conditions, GNSS signals are often affected by outliers; therefore, addressing o…

Superphot : Realtime Fitting and Classification of Supernova Light Curves
Kaylee M. de Soto (Center for Astrophysics | Harvard & Smithsonian), Ashley Villar (Center for Astrophysics | Harvard & Smithsonian), Edo Berger (Center for Astrophysics | Harvard & Smithsonian, The NSF AI Institute for Artificial Intelligence and Fundamental Interactions), Sebastian Gomez (Space Telescope Science Institute), Griffin Hosseinzadeh (Steward Observatory | University of Arizona), Doug Bra…

Superphot+: Realtime Fitting and Classification of Supernova Light Curves
Photometric classifications of supernova (SN) light curves have become necessary to utilize the full potential of large samples of observations obtained from wide-field photometric surveys, such as the Zwicky Transient Facility (ZTF) and the Vera C. Rubin Observatory. Here, we present a photometric classifier for SN light curves that does not rely on redshift information and still maintains comparable accuracy to redshift-dependent classifiers. Our new package, Superphot+, uses a parametric mod…

This https://arxiv.org/abs/2312.02527 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On Z-compactifiability of manifolds
In 1976, Chapman and Siebenmann \cite{CS76} established necessary and sufficient conditions for $\mathcal{Z}$-compactifying Hilbert cube manifolds. While these conditions are known to be necessary for a manifold $M^n$ to admit a $\mathcal{Z}$-compactification, it remains an open question whether these conditions are also sufficient. Guilbault and the author \cite[Thm. 1.2]{GG20} proved that these conditions are sufficient for the product $M^n \times [-2,2]$ $(n\geq 5)$ to be $\mathcal{Z}$-compa…

This https://arxiv.org/abs/2312.16678 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Crossed Products, Conditional Expectations and Constraint Quantization
Recent work has highlighted the importance of crossed products in correctly elucidating the operator algebraic approach to quantum field theories. In the gravitational context, the crossed product simultaneously promotes von Neumann algebras associated with subregions in diffeomorphism covariant quantum field theories from type III to type II, and provides the necessary ingredients to gravitationally dress operators, thereby enforcing the constraints of the theory. In this note we enhance the c…

Auswärtiges Amt ruft zu "notwendiger Unterstützung" Kiews auf
Nach dem Beginn der massiven russischen Offensive in der ostukrainischen Region Charkiw hat das Auswärtige Amt dazu aufgerufen, "die notwendige Unterstützung" für die Verteidigung der Ukraine zu sichern. "Die Bevölkerung von Charkiw leistet weiterhin tapferen Widerstand gegen die ständige russische Bombardierung", schrieb das Ministerium …
🐦

GermanForeignOffice (@GermanyDiplo) on X
Besieged, liberated, shelled: the people of #Kharkiv continue to bravely resist the constant Russian bombardment. Your courage calls for our solidarity. Together with our partners, we stand by #Ukraine and need to ensure the necessary support for its defence.

Global Shipyard Capacities Limiting the Ramp-Up of Global Hydrogen-based Transportation
Maximilian Stargardt (Forschungszentrum J\"ulich GmbH, Institute of Energy and Climate Research - Techno-economic Systems Analysis, RWTH Aachen University, Chair of Fuel Cells, Faculty of Mechanical Engineering, Aachen, Germany), David Kress (Forschungszentrum J\"ulich GmbH, Institute of Energy and Climate Research - Techno-economic Systems Analysis), Heidi Heinrichs (Forschungszentrum J\&…

Global Shipyard Capacities Limiting the Ramp-Up of Global Hydrogen-based Transportation
Decarbonizing the global energy system requires significant expansions of renewable energy technologies. Given that cost-effective renewable sources are not necessarily situated in proximity to the largest energy demand centers globally, the maritime transportation of low-carbon energy carriers, such as renewable-based hydrogen or ammonia, will be needed. However, whether existent shipyards possess the required capacity to provide the necessary global fleet has not yet been answered. Therefore,…

“Stupid weather,” I grumble to P on a walk. P gently urges me to redirect my frustration. “The weather is just responding to what capitalism has done to it, it’s just trying to adjust. Of course it’s going to be a little erratic.” I soften immediately and apologize to the wind, the cool in the air. It doesn’t owe any of us a gentle transition; it’s allowed to remind us that the level of destruction it's endured will inevitably result in a violent response. That’s how trauma works.
[...]
These are the questions I’m sitting with. I don’t have answers, but I know that some of it starts with more people taking seriously the possibility of other ways of being. The annoying but necessary demand that we consider that if we can’t get the state to stop funding a genocide (or killing Black people and poor people or denying care to trans people or pregnant people), then we have to stop the state."
~ Raechel Anne Jolie
This is a beautiful text, that gave me hope, even though at the end they forgot to list the disabled and chronically ill people, who are being denied care on an epic scale in this ongoing, yet normalized pandemic.
https://raechelannejolie.substack.com/p/impossible-conditions

The Choquet-like operator with respect to an admissible order as a tool for aggregating multivalued data
Micha{\l} Boczek, Tomasz J\'ozefiak, Marek Kaluszka, Andrzej Okolewski
https://arxiv.org/abs/2404.07994

The Choquet-like operator with respect to an admissible order as a tool for aggregating multivalued data
In this paper, we propose a new generalization of the classical discrete Choquet integral to the multivalued framework in terms of an admissible order that refines the natural partial order on the considered value set. The new Choquet-like operator takes as input a finite number of values of a given type, in particular real numbers, intervals, and vectors, and returns a~single output value of the same type as the input values. We give necessary and sufficient conditions for the operator to be m…

If I still had the attention span necessary to read long-form writing, something on my reading directory might be: more Joseph Stiglitz

The user questions if the cybersecurity field is oversaturated despite the high demand. They highlight that many fail to obtain necessary qualifications or don't prioritize networking, affecting job acquisition and pay in the industry. https://reddit.com/r/cybersecurity/comments/1bc3svk/

Who Killed Alaska? 🐕🔮👻
Dramatized mystery adventure | A private detective and an eccentric stoner compete to solve a mysterious death. Join Boo and Denver for this charming adventure, full of friendship, threats, threats of friendship, and just a touch of witchcraft.
A queer perspective and a neurodivergent perspectiv...
https:/…

Who Killed Alaska? 🐕🔮👻
Dramatized mystery adventure | A private detective and an eccentric stoner compete to solve a mysterious death. Join Boo and Denver for this charming adventure, full of friendship, threats, threats of friendship, and just a touch of witchcraft. A queer perspective and a neurodivergent perspective. Includes found family and necessary breakdowns. Depicting characters who "feel strange," because a lot of us feel strange a lot of the time. 2 seasons, 19 episodes as of Oct 05, 2023.

Bubble breakup probability in turbulent flows
Ali\'enor Rivi\`ere, St\'ephane Perrard
https://arxiv.org/abs/2403.08684 https://

Bubble breakup probability in turbulent flows
Bubbles drive gas and chemical transfers in various industrial and geophysical context, in which flows are typically turbulent. A knowledge of the bubble size distributions is then necessary to quantify mass fluxes across interfaces. In a turbulent flow, every bubble might break, depending on both the ratio between inertial and capillary forces at its scale, namely the Weber number We. For inhomogeneous and unstationary flows, the residence time within a turbulent region will also determine the…

Mixed feelings about this, but it’s probably necessary for Biden to get re elected. https://finance.yahoo.com/news/big-oil-is-doing-way-better-under-biden-than-under-trump-142434637.html

SCALHEALTH: Scalable Blockchain Integration for Secure IoT Healthcare Systems
Mehrzad Mohammadi, Reza Javan, Mohammad Beheshti-Atashgah, Mohammad Reza Aref
https://arxiv.org/abs/2403.08068

SCALHEALTH: Scalable Blockchain Integration for Secure IoT Healthcare Systems
Internet of Things (IoT) devices are capable of allowing for far-reaching access to and evaluation of patient data to monitor health and diagnose from a distance. An electronic healthcare system that checks patient data, prepares medicines and provides financial assistance is necessary. Providing safe data transmission, monitoring, decentralization, preserving patient privacy, and maintaining confidentiality are essential to an electronic healthcare system. In this study, we introduce (SCALHEAL…

MAMMOTH: Massively Multilingual Modular Open Translation @ Helsinki
Timothee Mickus, Stig-Arne Gr\"onroos, Joseph Attieh, Michele Boggia, Ona De Gibert, Shaoxiong Ji, Niki Andreas Lopi, Alessandro Raganato, Ra\'ul V\'azquez, J\"org Tiedemann
https://arxiv.org/abs/2403.07544…

MAMMOTH: Massively Multilingual Modular Open Translation @ Helsinki
NLP in the age of monolithic large language models is approaching its limits in terms of size and information that can be handled. The trend goes to modularization, a necessary step into the direction of designing smaller sub-networks and components with specialized functionality. In this paper, we present the MAMMOTH toolkit: a framework designed for training massively multilingual modular machine translation systems at scale, initially derived from OpenNMT-py and then adapted to ensure effici…

This https://arxiv.org/abs/2105.01473 has been replaced.
link: https://scholar.google.com/scholar?q=a

Equilibrium strategies in time-inconsistent stochastic control problems with constraints: necessary conditions
This paper is concerned with a time-inconsistent recursive stochastic control problems where the forward state process is constrained through an additional recursive utility system. By adapting the Ekeland variational principle, necessary conditions for equilibrium strategies are presented concerning a second-order Hamiltonian function defined by pairs of backward stochastic differential equations. At last, we consider a finite horizon state constrained investment-consumption problem with non-e…

If I still had the attention span necessary to read long-form writing, something on my reading list might be: more Leo Tolstoy

Multiset tomography: Optimizing quantum measurements by partitioning multisets of observables
Otto Veltheim, Esko Keski-Vakkuri
https://arxiv.org/abs/2403.07068

Multiset tomography: Optimizing quantum measurements by partitioning multisets of observables
Quantum tomography approaches typically consider a set of observables which we wish to measure, design a measurement scheme which measures each of the observables and then repeats the measurements as many times as necessary. We show that instead of considering only the simple set of observables, one should consider a multiset of the observables taking into account the required repetitions, to minimize the number of measurements. This leads to a graph theoretic multicolouring problem. We show th…

Is Data All That Matters? The Role of Control Frequency for Learning-Based Sampled-Data Control of Uncertain Systems
Ralf R\"omer, Lukas Brunke, Siqi Zhou, Angela P. Schoellig
https://arxiv.org/abs/2403.09504

Is Data All That Matters? The Role of Control Frequency for Learning-Based Sampled-Data Control of Uncertain Systems
Learning models or control policies from data has become a powerful tool to improve the performance of uncertain systems. While a strong focus has been placed on increasing the amount and quality of data to improve performance, data can never fully eliminate uncertainty, making feedback necessary to ensure stability and performance. We show that the control frequency at which the input is recalculated is a crucial design parameter, yet it has hardly been considered before. We address this gap b…

History teaching is not popular at schools lately, some people even think it's not necessary. However understanding current events around Ukraine, in Russia, around Gaza, for all of that is knowledge of history a necessity otherwise you are totally ignorant and you can't understand current events.
#education

This https://arxiv.org/abs/2207.03371 has been replaced.
link: https://scholar.google.com/scholar?q=a

Linear vs. nonlinear speed selection of the front propagation into unstable states
In this paper, we consider the speed selection problem of the scalar reaction-diffusion equations and the two-species Lotka-Volterra competition systems. We propose a sufficient and necessary criterion for this long-standing problem of monostable dynamical systems for the first time, from a different point of view as compared to the classical result on single equations in [Lucia-Muratov-Novaga, CPAM 2004]. Moreover, our results can further reveal the essence of the linear determined problem fro…

Conditions of positivity on a shadow Markoff Tree
Nathan Bonin
https://arxiv.org/abs/2403.07668 https://arxiv.org/pdf/2403.07668

Conditions of positivity on a shadow Markoff Tree
An analogue of the Markoff equation has recently been introduced by the author and Valentin Ovsienko. A conjecture about the necessary and sufficient conditions for positivity of solutions to this equation is formulated and discussed.

This https://arxiv.org/abs/2306.10707 has been replaced.
link: https://scholar.google.com/scholar?q=a

Partial-order Checking with Unfolding for Linear Temporal Properties
Unfolding can tackle the path-explosion problem caused by concurrency. Traditional unfolding generation faces an NP-complete problem when adding events to the unfolding structure, which also exists in the case of verifying linear temporal logic (LTL). The reason is that it is necessary to enumerate possible concurrent event combinations after adding an event. Many state-of-the-art methods optimally explore unfolding-based structure (called event structure) by a tree-like structure, which should…

Building-block flow model for computational fluids
Gonzalo Arranz, Yuenong Ling, Sam Costa, Konrad Goc, Adrian Lozano-Duran
https://arxiv.org/abs/2403.09000

Building-block flow model for computational fluids
We introduce a closure model for computational fluid dynamics, referred to as the Building-block Flow Model (BFM). The foundation of the model rests on the premise that a finite collection of simple flows encapsulates the essential physics necessary to predict more complex scenarios. The BFM is implemented using artificial neural networks and introduces five unique advancements within the framework of large-eddy simulation: (1) It is designed to predict multiple flow regimes (wall turbulence un…

Hyperbolic Anderson equations with general time-independent Gaussian noise: Stratonovich regime
Xia Chen, Yaozhong Hu
https://arxiv.org/abs/2403.08603 http…

Hyperbolic Anderson equations with general time-independent Gaussian noise: Stratonovich regime
In this paper, we investigate the hyperbolic Anderson equation generated by a time-independent Gaussian noise with two objectives: The solvability and intermittency. First, we prove that Dalang's condition is necessary and sufficient for existence of the solution. Second, we establish the precise long time and high moment asymptotics for the solution under the usual homogeneity assumption of the covariance of the Gaussian noise. Our approach is fundamentally different from the o…

Global Shipyard Capacities Limiting the Ramp-Up of Global Hydrogen-based Transportation
Maximilian Stargardt (Forschungszentrum J\"ulich GmbH, Institute of Energy and Climate Research - Techno-economic Systems Analysis, RWTH Aachen University, Chair of Fuel Cells, Faculty of Mechanical Engineering, Aachen, Germany), David Kress (Forschungszentrum J\"ulich GmbH, Institute of Energy and Climate Research - Techno-economic Systems Analysis), Heidi Heinrichs (Forschungszentrum J\&…

Global Shipyard Capacities Limiting the Ramp-Up of Global Hydrogen-based Transportation
Decarbonizing the global energy system requires significant expansions of renewable energy technologies. Given that cost-effective renewable sources are not necessarily situated in proximity to the largest energy demand centers globally, the maritime transportation of low-carbon energy carriers, such as renewable-based hydrogen or ammonia, will be needed. However, whether existent shipyards possess the required capacity to provide the necessary global fleet has not yet been answered. Therefore,…

This https://arxiv.org/abs/2312.05419 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Discrete-time Negative Imaginary Systems from ZOH Sampling
A new definition of discrete-time negative imaginary (NI) systems is provided. This definition characterizes the dissipative property of a zero-order hold sampled continuous-time NI system. Under some assumptions, asymptotic stability can be guaranteed for the closed-loop interconnection of an NI system and an output strictly negative imaginary system, with one of them having a one step advance. In the case of linear systems, we also provide necessary and sufficient frequency-domain and LMI con…

US announces $138 million in sales to bolster Ukraine’s HAWK air defense system: https://benborges.xyz/2024/04/10/us-announces-million.html

Sonos responds to criticism of its app redesign, saying it takes "courage to rebuild" a product from the ground up and it plans to reintroduce missing features (Chris Welch/The Verge)
https://www.theverge.com/2024/5/9/24152675/sono…

Sonos says its controversial app redesign took ‘courage’
The redesigned Sonos app isn’t going over well with some customers because of missing features. But the company says it was a necessary change for the future.

Two novel pure-state coherence measures in quantifying coherence
Manis Hazra, Debabrata Goswami
https://arxiv.org/abs/2403.07146 https://

Two novel pure-state coherence measures in quantifying coherence
In the resource theory of coherence, the quantification of quantum-state coherence is an important task. In this regard, the key ingredients are the various coherence monotones (or measures). There are few coherence-monotone classes that solely depend on other coherence measures defined for all the pure states; in other words, they rely on the pure state coherence measures (PSCM). Here, we set forth two such novel PSCMs, and validate each of them through the fulfillment of all four necessary co…

Towards a Stallings-type theorem for finite groups
Johannes Carmesin, George Kontogeorgiou, Jan Kurkofka, Will J. Turner
https://arxiv.org/abs/2403.07776 h…

Towards a Stallings-type theorem for finite groups
A recent development in graph theory is to study local separators, vertex sets that need not separate graphs globally but just locally. We use this idea to conjecture an extension of Stallings' theorem to finite nilpotent groups. We provide an example demonstrating that the assumption of nilpotency is necessary, and prove a stronger form of this conjecture for low connectivities, as follows. A finite nilpotent group that has a Cayley graph with a local separator of size at most two is cyclic,…

This https://arxiv.org/abs/2305.08785 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

On Assumptions with Respect to Occlusions in Urban Environments for Automated Vehicle Speed Decisions
Automated driving systems are subject to various kinds of uncertainty during design, development, and operation. These kinds of uncertainty lead to an inherent risk of the technology that can be mitigated, but never fully eliminated. Situations involving obscured traffic participants have become popular examples in the field to illustrate a subset of these uncertainties that developers must deal with during system design and implementation. In this paper, we describe necessary assumptions for a…

This https://arxiv.org/abs/2211.05759 has been replaced.
link: https://scholar.google.com/scholar?q=a

Counting operators in Effective Field Theories
We systematically develop the Hilbert series technique for counting independent operators in Effective Field Theories. In the hope of providing more approachable entry point to the subject we include a detailed introduction of all necessary group theoretic tools (in a rather mathematical definition-theorem-proof style). Finally, we apply the formalism in the case of a single scalar field and also electromagnetic field, partly reproducing and partly extending known results.

Guiding Clinical Reasoning with Large Language Models via Knowledge Seeds
Jiageng WU, Xian Wu, Jie Yang
https://arxiv.org/abs/2403.06609 https://

Guiding Clinical Reasoning with Large Language Models via Knowledge Seeds
Clinical reasoning refers to the cognitive process that physicians employ in evaluating and managing patients. This process typically involves suggesting necessary examinations, diagnosing patients' diseases, and deciding on appropriate therapies, etc. Accurate clinical reasoning requires extensive medical knowledge and rich clinical experience, setting a high bar for physicians. This is particularly challenging in developing countries due to the overwhelming number of patients and limited phys…

This https://arxiv.org/abs/2305.17283 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Sharpened Lazy Incremental Quasi-Newton Method
The problem of minimizing the sum of $n$ functions in $d$ dimensions is ubiquitous in machine learning and statistics. In many applications where the number of observations $n$ is large, it is necessary to use incremental or stochastic methods, as their per-iteration cost is independent of $n$. Of these, Quasi-Newton (QN) methods strike a balance between the per-iteration cost and the convergence rate. Specifically, they exhibit a superlinear rate with $O(d^2)$ cost in contrast to the linear ra…

This https://arxiv.org/abs/2401.08270 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Unified understanding of the breakdown of thermal mixing dynamic nuclear polarization: the role of temperature and radical concentration
We reveal an interplay between temperature and radical concentration necessary to establish thermal mixing (TM) as an efficient dynamic nuclear polarization (DNP) mechanism. We conducted DNP experiments by hyperpolarizing widely used DNP samples, i.e., sodium pyruvate-1-$^{13}$C in water/glycerol mixtures at varying nitroxide radical (TEMPOL) concentrations and microwave irradiation frequencies, measuring proton and carbon-13 spin temperatures. Using a cryogen consumption-free prototype-DNP app…

This https://arxiv.org/abs/2102.00652 has been replaced.
link: https://scholar.google.com/scholar?q=a

Finite Codimensionality Method in Infinite-dimensional Optimization Problems
This paper is devoted to establishing an enhanced Fritz John type first-order necessary condition for a general constrained nonlinear infinite-dimensional optimization problem. Unlike traditional constraint qualifications in optimization theory, a condition of finite codimensionality is employed to ensure the existence of nontrivial Lagrange multipliers. As applications, first-order necessary conditions for optimal control problems of some deterministic/stochastic control systems are derived in…

This https://arxiv.org/abs/2208.00307 has been replaced.
link: https://scholar.google.com/scholar?q=a

Turnpilke property for infinite-dimensional generalized LQ problem
We deduce a sufficient condition of the exponential (integral) turnpike property for infinite dimensional generalized linear-quadratic optimal control problems in terms of structural properties of the control system, such as exponential stabilizability and detectability. The proof relies on the analysis of the exponential convergence of solutions to the differential Riccati equations to the algebraic counterpart, and on a necessary condition for exponential stabilizability in terms of a closed …