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arXiv preprints from January 1, 2026 through July 20, 2026 — 18:33:49 EST

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Posted in cs.CV · 2026-01-20 · Tiancheng Fang, Bowen Pan, Lingxi Chen, Jiangjing Lyu, Chengfei Lyu, Chaoyue Niu, Fan Wu

VIAFormer: Voxel-Image Alignment Transformer for High-Fidelity Voxel Refinement

We propose VIAFormer, a Voxel-Image Alignment Transformer model designed for Multi-view Conditioned Voxel Refinement--the task of repairing incomplete noisy voxels using calibrated multi-view images as guidance. Its effectiveness stems from a synergistic design: an Image Index that provides explicit 3D spatial grounding for 2D image...

💬 0 commentsarXiv:2601.13664v2PDF
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Posted in cs.CG · 2026-01-20 · Daniel Kalmanovich, Yaar Solomon

On the stability, complexity, and distribution of similarity classes of the longest edge bisection process for triangles

The Longest Edge Bisection of a triangle is performed by joining the midpoint of its longest edge to the opposite vertex. Applying this procedure iteratively produces an infinite family of triangles. Surprisingly, a classical result of Stynes (1980) shows that for any initial triangle, the elements of this infinite family fall into...

💬 0 commentsarXiv:2601.13663v3PDF
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Posted in cs.NI · 2026-01-20 · Sivaram Krishnan, Zhouyou Gu, Jihong Park, Sung-Min Oh, Jinho Choi

Reinforcement Learning for Opportunistic Routing in Software-Defined LEO-Terrestrial Systems

The proliferation of large-scale low Earth orbit (LEO) satellite constellations is driving the need for intelligent routing strategies that can effectively deliver data to terrestrial networks under rapidly time-varying topologies and intermittent gateway visibility. Leveraging the global control capabilities of a geostationary...

💬 0 commentsarXiv:2601.13662v1PDF
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Posted in math.DG · 2026-01-20 · Debadrita Munshi, Lavanya Kumar, Soumendu Roy

Kenmotsu Contact Geometry Through the Lens of $\ast-\boldsymbolκ$-Ricci-Bourguignon Almost Solitons

This paper focuses on the study of the newly introduced $\ast-\boldsymbolκ$-Ricci-Bourguignon almost soliton pertaining to Kenmotsu structure manifolds. Our analysis concerns the characteristics of this soliton and derive the scalar curvature for a Kenmotsu manifold admitting such a structure. Further, we formulate the corresponding...

💬 0 commentsarXiv:2601.13661v2PDF
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Posted in econ.TH · 2026-01-20 · Dipankar Das

Pairwise Beats All-at-Once: Behavioral Gains from Sequential Choice Presentation

This paper presents the Sequential Rationality Hypothesis, which argues that consumers are better able to make utility-maximizing decisions when products appear in sequential pairwise comparisons rather than in simultaneous multi-option displays. Although this involves higher cognitive costs than the all-at-once format, the current...

💬 0 commentsarXiv:2601.15332v1PDF
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Posted in astro-ph.GA · 2026-01-20 · Aiko Miyamoto, Taiki Kawamuro, Hirokazu Odaka, Takuma Izumi, Hironori Matsumoto

Possible time-variable iron-K$α$ emission in the circumnuclear region of the Circinus galaxy

We present imaging and spatially resolved spectral analyses of eight Chandra data taken for the Circinus galaxy in $\approx$ 22 years to reveal neutral iron-K$α$ emission on a circumnuclear scale ($\sim$ 10--100 pc) and search for time variability in the emission. By simulating and taking account of point-source emission from the...

💬 0 commentsarXiv:2601.13660v2PDF
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Posted in cs.CL · 2026-01-20 · Chunlei Meng, Ziyang Zhou, Lucas He, Xiaojing Du, Chun Ouyang, Zhongxue Gan

Temporal-Spatial Decouple before Act: Disentangled Representation Learning for Multimodal Sentiment Analysis

Multimodal Sentiment Analysis integrates Linguistic, Visual, and Acoustic. Mainstream approaches based on modality-invariant and modality-specific factorization or on complex fusion still rely on spatiotemporal mixed modeling. This ignores spatiotemporal heterogeneity, leading to spatiotemporal information asymmetry and thus limited...

💬 0 commentsarXiv:2601.13659v1PDF
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Posted in cs.CL · 2026-01-20 · Arthur Amalvy, Hen-Hsen Huang

Beyond Known Facts: Generating Unseen Temporal Knowledge to Address Data Contamination in LLM Evaluation

The automatic extraction of information is important for populating large web knowledge bases such as Wikidata. The temporal version of that task, temporal knowledge graph extraction (TKGE), involves extracting temporally grounded facts from text, represented as semantic quadruples (subject, relation, object, timestamp). Many recent...

💬 0 commentsarXiv:2601.13658v1PDF
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Posted in cs.RO · 2026-01-20 · Myong-Yol Choi, Hankyoul Ko, Hanse Cho, Changseung Kim, Seunghwan Kim, Jaemin Seo, Hyondong Oh

Communication-Free Collective Navigation for a Swarm of UAVs via LiDAR-Based Deep Reinforcement Learning

This paper presents a deep reinforcement learning (DRL) based controller for collective navigation of unmanned aerial vehicle (UAV) swarms in communication-denied environments, enabling robust operation in complex, obstacle-rich environments. Inspired by biological swarms where informed individuals guide groups without explicit...

💬 0 commentsarXiv:2601.13657v1PDF
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Posted in cond-mat.mtrl-sci · 2026-01-20 · Yunlong Wang, Zhixin Liang, Chi Ding, Junjie Wang, Zheyong Fan, Hui-Tian Wang, Dingyu Xing, Jian Sun

GPUTB-2:An efficient E(3) network method for learning high-precision orthogonal Hamiltonian

Although equivariant neural networks have become a cornerstone for learning electronic Hamiltonians, the intrinsic non-orthogonality of linear combinations of atomic orbitals (LCAO) basis sets poses a fundamental challenge. The computational cost of Hamiltonian orthogonalization scales as O(N^3), which severely hinders electronic...

💬 0 commentsarXiv:2601.13656v1PDF
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Posted in cs.SE · 2026-01-20 · Guangba Yu, Zirui Wang, Yujie Huang, Renyi Zhong, Yuedong Zhong, Yilun Wang, Michael R. Lyu

Why Does the LLM Stop Computing: An Empirical Study of User-Reported Failures in Open-Source LLMs

The democratization of open-source Large Language Models (LLMs) allows users to fine-tune and deploy models on local infrastructure but exposes them to a First Mile deployment landscape. Unlike black-box API consumption, the reliability of user-managed orchestration remains a critical blind spot. To bridge this gap, we conduct the...

💬 0 commentsarXiv:2601.13655v1PDF
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Posted in cond-mat.str-el · 2026-01-20 · Shashank Kumar Ojha, Jyotirmay Maity, Srimanta Middey

When electrons meet ferroelastic domain walls in Strontium Titanate

Strontium titanate (SrTiO$_3$), famously described by Nobel laureate K. A. Müller as the "drosophila of solid-state physics", has been extensively investigated over the last seventy five years for its intricate coupling of structural, electronic, and dielectric properties and continues to serve as a foundational platform for advancing...

💬 0 commentsarXiv:2601.13654v1PDF
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Posted in cs.LG · 2026-01-20 · Xingjian Wu, Junkai Lu, Zhengyu Li, Xiangfei Qiu, Jilin Hu, Chenjuan Guo, Christian S. Jensen, Bin Yang

TimeART: Towards Agentic Time Series Reasoning via Tool-Augmentation

Time series data widely exist in real-world cyber-physical systems. Though analyzing and interpreting them contributes to significant values, e.g, disaster prediction and financial risk control, current workflows mainly rely on human data scientists, which requires significant labor costs and lacks automation. To tackle this, we...

💬 0 commentsarXiv:2601.13653v1PDF
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Posted in astro-ph.SR · 2026-01-20 · Fang-Bin Meng, Li-Ying Zhu, Sheng-Bang Qian, Nian-Ping Liu, Jia Zhang, David Mkrtichian, Soonthornthum Boonrucksar, Er-Gang Zha

HD 26172: an active solar-type subgiant in a close binary system

We present the first comprehensive photometric and spectroscopic analysis of the RS CVn system HD 26172, robustly determining the previously debated evolutionary state of its primary star. Since this system is a single-lined spectroscopic binary with spot-induced light curve modulations, we derived its physical parameters by combining...

💬 0 commentsarXiv:2601.13652v1PDF
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Posted in cs.CV · 2026-01-20 · Marta Moscati, Oleksandr Kats, Mubashir Noman, Muhammad Zaigham Zaheer, Yufang Hou, Markus Schedl, Shah Nawaz

Face-Voice Association with Inductive Bias for Maximum Class Separation

Face-voice association is widely studied in multimodal learning and is approached representing faces and voices with embeddings that are close for a same person and well separated from those of others. Previous work achieved this with loss functions. Recent advancements in classification have shown that the discriminative ability of...

💬 0 commentsarXiv:2601.13651v1PDF
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Posted in cs.CL · 2026-01-20 · Xiaolin Zhou, Zheng Luo, Yicheng Gao, Qixuan Chen, Xiyang Hu, Yue Zhao, Ruishan Liu

Fairness or Fluency? An Investigation into Language Bias of Pairwise LLM-as-a-Judge

Recent advances in Large Language Models (LLMs) have incentivized the development of LLM-as-a-judge, an application of LLMs where they are used as judges to decide the quality of a certain piece of text given a certain context. However, previous studies have demonstrated that LLM-as-a-judge can be biased towards different aspects of...

💬 0 commentsarXiv:2601.13649v1PDF
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Posted in quant-ph · 2026-01-20 · GunSik Min, IlKwon Sohn, Jun Heo

3D Stacked Surface-Code Architecture for Measurement-Free Fault-Tolerant Quantum Error Correction

Mid-circuit measurements are a major bottleneck for superconducting quantum processors because they are slower and noisier than gates. Measurement-free quantum error correction (mfec) replaces repeated measurements and classical feed-forward by coherent quantum feedback, but existing mfec protocols suffer from severe connectivity...

💬 0 commentsarXiv:2601.13648v1PDF
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Posted in cs.SD · 2026-01-20 · Yumin Kim, Seonghyeon Go

Fusion Segment Transformer: Bi-Directional Attention Guided Fusion Network for AI-Generated Music Detection

With the rise of generative AI technology, anyone can now easily create and deploy AI-generated music, which has heightened the need for technical solutions to address copyright and ownership issues. While existing works mainly focused on short-audio, the challenge of full-audio detection, which requires modeling long-term structure...

💬 0 commentsarXiv:2601.13647v1PDF
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Posted in quant-ph · 2026-01-20 · Mingran Zhang, Jiahao Joel Fan, Frank Schlawin, Zhedong Zhang

Theory for Entangled-Photons Stimulated Raman Scattering versus Nonlinear Absorption for Polyatomic Molecules

Quantum entanglement offers an incredible resource for enhancing the sensing and spectroscopic probes. Here we develop a microscopic theory for the stimulated Raman scattering (SRS) using entangled photons. We demonstrate that the time-energy correlation of the photon pairs can optimize the signal for polyatomic molecules. Our results...

💬 0 commentsarXiv:2601.13646v1PDF
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Posted in cs.LG · 2026-01-20 · Euijin You, Hyang-Won Lee

Quadratic Upper Bound for Boosting Robustness

Fast adversarial training (FAT) aims to enhance the robustness of models against adversarial attacks with reduced training time, however, FAT often suffers from compromised robustness due to insufficient exploration of adversarial space. In this paper, we develop a loss function to mitigate the problem of degraded robustness under...

💬 0 commentsarXiv:2601.13645v1PDF
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Posted in cs.CL · 2026-01-20 · Yang Cao, Bicheng Yu, Sikun Yang, Ming Liu, Yujiu Yang

Towards Token-Level Text Anomaly Detection

Despite significant progress in text anomaly detection for web applications such as spam filtering and fake news detection, existing methods are fundamentally limited to document-level analysis, unable to identify which specific parts of a text are anomalous. We introduce token-level anomaly detection, a novel paradigm that enables...

💬 0 commentsarXiv:2601.13644v1PDF
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Posted in math.AG · 2026-01-20 · Shouhei Ma

Borcherds products approximating Gersten complex

For an orthogonal modular variety, we construct a complex which is defined in terms of lattices and elliptic modular forms, which resembles the Gersten complex in Milnor K-theory, and which has a morphism to the Gersten complex of the modular variety by the Borcherds lifting. This provides a formalism for approaching the higher Chow...

💬 0 commentsarXiv:2601.13643v1PDF
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Posted in stat.ML · 2026-01-20 · Yuchen Jiao, Jiin Woo, Gen Li, Gauri Joshi, Yuejie Chi

Sample Complexity of Average-Reward Q-Learning: From Single-agent to Federated Reinforcement Learning

Average-reward reinforcement learning offers a principled framework for long-term decision-making by maximizing the mean reward per time step. Although Q-learning is a widely used model-free algorithm with established sample complexity in discounted and finite-horizon Markov decision processes (MDPs), its theoretical guarantees for...

💬 0 commentsarXiv:2601.13642v1PDF
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Posted in stat.AP · 2026-01-20 · Shuvayan Banerjee, Radhendushka Srivastava, James Saunderson, Ajit Rajwade

Correction of Pooling Matrix Mis-specifications in Compressed Sensing Based Group Testing

Compressed sensing, which involves the reconstruction of sparse signals from an under-determined linear system, has been recently used to solve problems in group testing. In a public health context, group testing aims to determine the health status values of p subjects from n<<p pooled tests, where a pool is defined as a mixture of...

💬 0 commentsarXiv:2601.13641v1PDF