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All arXiv

arXiv preprints from January 1, 2026 through September 23, 2026 — 12:19:34 EST

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Posted in math.OC · 2026-01-09 · Stéphane Alarie, Charles Audet, Miguel Diago, Sébastien Le Digabel, Xavier Lebeuf

Multi-fidelity constraints in blackbox optimization

This work studies constrained blackbox optimization problems that cannot be solved in reasonable time due to prohibitive computational costs. This challenge is especially prevalent in industrial applications, where blackbox evaluations are costly. However, constraints can be evaluated at various fidelities at a lower computational...

💬 0 commentsarXiv:2601.06321v1PDF
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Posted in cs.LG · 2026-01-09 · Zhe Jia, Xiaotian Zhang, Junpeng Li

Sensoformer: Robust Sim-to-Real Inference on Variable-Geometry Sensor Sets via Physics-Structured Randomization

Inferring high-dimensional physical states from sparse, ad-hoc sensor arrays is a fundamental challenge across AI for Science and industrial IoT. Standard machine learning architectures struggle in these domains due to irregular, variable-cardinality sensor geometries and the profound sim-to-real distribution shift caused by unmodeled...

💬 0 commentsarXiv:2601.06320v3PDF
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Posted in physics.atom-ph · 2026-01-09 · Brandon Iritani, Jingjing Huang, Wenwei Xu, Gisung Sim, Robert Moszynski, Tanya Zelevinsky

Creation and precise spectroscopy of $^{86}$Sr$_2$ halo molecules

We report on the creation of $^{86}$Sr$_2$ molecules in the halo state and neighboring weakly bound states. Efficient molecule production via one-photon photoassociation relies on sufficient wavefunction overlap between the target vibrational states in the electronic excited- and ground-state potentials. Using Autler-Townes...

💬 0 commentsarXiv:2601.06319v1PDF
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Posted in physics.flu-dyn · 2026-01-09 · Khalid Saqr

Lagrangian Phase-Lag and Geometric Precedence in Turbulent Vortex Stretching

This study investigates the causal timeline of vortex stretching in high-Reynolds-number turbulence ($Re_λ\approx 433$) using Lagrangian tracking in $1024^3$ direct numerical simulations. While classical theories often assume an instantaneous alignment between strain and vorticity, the present analysis identifies a systematic...

💬 0 commentsarXiv:2601.08862v1PDF
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Posted in cs.NE · 2026-01-09 · Zimin Liang, Miqing Li

Random is Faster than Systematic in Multi-Objective Local Search

Local search is a fundamental method in operations research and combinatorial optimisation. It has been widely applied to a variety of challenging problems, including multi-objective optimisation where multiple, often conflicting, objectives need to be simultaneously considered. In multi-objective local search algorithms, a common...

💬 0 commentsarXiv:2601.06318v1PDF
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Posted in math.ST · 2026-01-09 · Yang Lu

Estimation of the intercept parameter in integrated Galton-Watson processes

We study estimation of the intercept parameter in an integrated Galton-Watson process, a basic building-block for many count-valued time series models. In this unit root setting, the ordinary least squares estimator is inconsistent, whereas an existing weighted least squares (WLS) estimator is consistent only in the case where the...

💬 0 commentsarXiv:2601.06317v1PDF
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Posted in cs.CL · 2026-01-09 · Mutaz Ayesh, Saif M. Mohammad, Nedjma Ousidhoum

Annotating Dimensions of Social Perception in Text: A Sentence-Level Dataset of Warmth and Competence

Warmth (W) (often further broken down intoTrust (T) and Sociability (S)) and Competence (C) are central dimensions along which people evaluate individuals and social groups (Fiske, 2018). While these constructs are well established in social psychology, they are only starting to get attention in NLP research through word-level...

💬 0 commentsarXiv:2601.06316v3PDF
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Posted in eess.SY · 2026-01-09 · Selin Ezgi Ozcan, Mustafa Mert Ankarali

Koopman Model Dimension Reduction via Variational Bayesian Inference and Graph Search

Koopman operator recently gained increasing attention in the control systems community for its abilities to bridge linear and nonlinear systems. Data driven Koopman operator approximations have established themselves as key enablers for system identification and model predictive control. Nonetheless, such methods commonly entail a...

💬 0 commentsarXiv:2601.06315v2PDF
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Posted in nlin.PS · 2026-01-09 · Matthew Visomirski, Christopher Griffin

Coherent Structures and Travelling Waves in Spatial Replicators from a Biased Volterra Lattice

The Volterra lattice is a well-known integrable family that is also a special class of replicator dynamics and whose members can be put in one-to-one correspondence with the directed cycle graphs. In this paper, we study a variation of the Volterra lattice by introducing a bias term in the replicator interaction matrix. The resulting...

💬 0 commentsarXiv:2601.06314v1PDF
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Posted in astro-ph.HE · 2026-01-09 · Sol Gutiérrez-Lara, Daniel C. M. Palumbo, Michael D. Johnson

The Role of Interferometric Phase in Measuring Black Hole Photon Rings

The Event Horizon Telescope (EHT) captured the first images of a black hole using Very Long Baseline Interferometry (VLBI). In the near future, extensions of the EHT such as the Black Hole Explorer (BHEX) will allow access to finer-scale features, such as a black hole's ''photon ring.'' In the Kerr spacetime, this image structure...

💬 0 commentsarXiv:2601.06313v1PDF
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Posted in quant-ph · 2026-01-09 · Eugene Y. S. Chua

Looking for Work in Quantum Thermodynamics

This paper diagnoses a much-discussed problem in quantum thermodynamics, that of generalizing classical work into the quantum domain. I begin with the no-go theorem of Perarnau-Llobet et al (2017): no universal measurement scheme for quantum work satisfies two intuitive, classically consilient desiderata. I assess this incompatibility...

💬 0 commentsarXiv:2601.06312v1PDF
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Posted in cs.CY · 2026-01-09 · Kevin Riehl, Omar Alami Badissi, Anastasios Kouvelas, Michail A. Makridis

C-EQ-ALINEA: Distributed, Coordinated, and Equitable Ramp Metering Strategy for Sustainable Freeway Operations

Ramp metering is a widely deployed traffic management strategy for improving freeway efficiency, yet conventional approaches often lead to highly uneven delay distributions across on-ramps, undermining user acceptance and long-term sustainability. While existing fairness-aware ramp metering methods can mitigate such disparities, they...

💬 0 commentsarXiv:2601.06311v1PDF
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Posted in math.FA · 2026-01-09 · R. E. Carrera, A. W. Hager, B. Wynne

Some minimum topological spaces, and vector lattices

We investigate the existence of compact Hausdorff spaces $X$ that are minimum with respect to $cX=K$ for some fixed covering operator $c$ and compact Hausdorff space $K$ with $cK=K$. Then, using the Yosida representation theorem, we show how that situation relates to the existence of Archimedean vector lattices $A$ with distinguished...

💬 0 commentsarXiv:2601.06310v1PDF
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Posted in cs.CV · 2026-01-09 · Zane Durante, Silky Singh, Arpandeep Khatua, Shobhit Agarwal, Reuben Tan, Yong Jae Lee, Jianfeng Gao, Ehsan Adeli, Li Fei-Fei

VideoWeave: A Data-Centric Approach for Efficient Video Understanding

Training video-language models is often prohibitively expensive due to the high cost of processing long frame sequences and the limited availability of annotated long videos. We present VideoWeave, a simple yet effective approach to improve data efficiency by constructing synthetic long-context training samples that splice together...

💬 0 commentsarXiv:2601.06309v1PDF
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Posted in eess.SP · 2026-01-09 · Mostafa Darvishi

Timing Fragility Aware Selective Hardening of RISCV Soft Processors on SRAM Based FPGAs

Selective hardening is widely employed to improve the reliability of FPGA based soft processors while limiting the overhead of full redundancy. However, existing approaches primarily rely on architectural criticality or functional fault analysis, overlooking the impact of routing dependent timing sensitivity on processor robustness....

💬 0 commentsarXiv:2601.06308v1PDF
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Posted in cs.CL · 2026-01-09 · Ishika Agarwal, Zhenlin He, Dhruva Patil, Dilek Hakkani-Tür

A Rising Tide Lifts All Boats: MTQE Rewards for Idioms Improve General Translation Quality

Non-compositional expressions (e.g., idioms, proverbs, and metaphors) pose significant challenges for neural machine translation systems because their meanings cannot be derived from individual words alone. These expressions encode rich, cultural meaning, and have both figurative and literal meanings, making accurate translation...

💬 0 commentsarXiv:2601.06307v1PDF
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Posted in cs.CL · 2026-01-09 · Md. Shihab Uddin Riad

SyntaxMind at BLP-2025 Task 1: Leveraging Attention Fusion of CNN and GRU for Hate Speech Detection

This paper describes our system used in the BLP-2025 Task 1: Hate Speech Detection. We participated in Subtask 1A and Subtask 1B, addressing hate speech classification in Bangla text. Our approach employs a unified architecture that integrates BanglaBERT embeddings with multiple parallel processing branches based on GRUs and CNNs,...

💬 0 commentsarXiv:2601.06306v1PDF
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Posted in cs.CL · 2026-01-09 · Hoang-Chau Luong, Lingwei Chen

Why LoRA Fails to Forget: Regularized Low-Rank Adaptation Against Backdoors in Language Models

Low-Rank Adaptation (LoRA) is widely used for parameter-efficient fine-tuning of large language models, but it is notably ineffective at removing backdoor behaviors from poisoned pretrained models when fine-tuning on clean dataset. Contrary to the common belief that this weakness is caused primarily by low rank, we show that LoRA's...

💬 0 commentsarXiv:2601.06305v1PDF
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Posted in physics.flu-dyn · 2026-01-09 · Qi Wang, Zejian You

Localization of sources in weakly nonlinear fluid systems using linear and quadratic sensitivity analysis

We develop a framework for localized source detection in dynamical systems governed by nonlinear partial differential equations based on first and second-order sensitivity analysis. Building on the standard adjoint formulation, which relates multiple measurements to external sources through a linear duality relation, we first...

💬 0 commentsarXiv:2601.06304v2PDF
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Posted in quant-ph · 2026-01-09 · Sofía Perón Santana, Ariel Fiuri, Martín Domínguez, Omar Osenda

The pros and cons of using deep reinforcement learning or genetic algorithms to design control schemes for quantum state transfer on qubit chains

In recent years, control methods based on different optimization techniques have shed light on the possibilities of processing information in many quantum systems. When exploring the transmission of quantum states, faster transmission times are mandatory to avoid the deleterious effects of multiple sources of decoherence that spoil...

💬 0 commentsarXiv:2601.06303v1PDF
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Posted in hep-ph · 2026-01-09 · Yakov Mandel

Baryogenesis from the Thermodynamic Arrow of Time: a Transfer-Function Bound and an Entropy-Clock Mechanism

We establish a quantitative statement: baryogenesis driven by a purely oscillatory (zero-mean) chemical potential is parametrically suppressed under smooth freeze-out (adiabatic cancellation). A simple toy model yields an analytic low-pass transfer function F(x)=1/sqrt(1+x^2), with x = omegatau_off, capturing the suppression for...

💬 0 commentsarXiv:2601.06302v1PDF
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Posted in cs.CR · 2026-01-09 · Arth Bhardwaj, Nirav Diwan, Gang Wang

Beyond BeautifulSoup: Benchmarking LLM-Powered Web Scraping for Everyday Users

Web scraping has historically required technical expertise in HTML parsing, session management, and authentication circumvention, which limited large-scale data extraction to skilled developers. We argue that large language models (LLMs) have democratized web scraping, enabling low-skill users to execute sophisticated operations...

💬 0 commentsarXiv:2601.06301v1PDF
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Posted in cs.CL · 2026-01-09 · Trisha Das, Mandis Beigi, Jacob Aptekar, Jimeng Sun

$\texttt{AMEND++}$: Benchmarking Eligibility Criteria Amendments in Clinical Trials

Clinical trial amendments frequently introduce delays, increased costs, and administrative burden, with eligibility criteria being the most commonly amended component. We introduce \textit{eligibility criteria amendment prediction}, a novel NLP task that aims to forecast whether the eligibility criteria of an initial trial protocol...

💬 0 commentsarXiv:2601.06300v1PDF
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Posted in cs.CC · 2026-01-09 · Amik Raj Behera, Magnus Rahbek Dalgaard Hansen, Nutan Limaye, Srikanth Srinivasan

Separation Results for Constant-Depth and Multilinear Ideal Proof Systems

In this work, we establish separation theorems for several subsystems of the Ideal Proof System (IPS), an algebraic proof system introduced by Grochow and Pitassi (J. ACM, 2018). Separation theorems are well-studied in the context of classical complexity theory, Boolean circuit complexity, and algebraic complexity. In an important...

💬 0 commentsarXiv:2601.06299v1PDF
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Posted in quant-ph · 2026-01-09 · Sabrina Yue Wang, Raul A. Santos

Quantum algorithm for dephasing of coupled systems: decoupling and IQP duality

Noise and decoherence are ubiquitous in the dynamics of quantum systems coupled to an external environment. In the regime where environmental correlations decay rapidly, the evolution of a subsytem is well described by a Lindblad quantum master equation. In this work, we introduce a quantum algorithm for simulating unital Lindbladian...

💬 0 commentsarXiv:2601.06298v2PDF