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Computer Science

arXiv preprints from January 1, 2026 through July 21, 2026 — 06:09:14 EST

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Posted in cs.DS · 2026-01-13 · Robert Wang, Lap Chi Lau, Hong Zhou

Derandomizing Matrix Concentration Inequalities from Free Probability

Recently, sharp matrix concentration inequalities~\cite{BBvH23,BvH24} were developed using the theory of free probability. In this work, we design polynomial time deterministic algorithms to construct outcomes that satisfy the guarantees of these inequalities. As direct consequences, we obtain polynomial time deterministic algorithms...

💬 0 commentsarXiv:2601.08111v2PDF
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Posted in cs.RO · 2026-01-13 · Reza Arablouei

Efficient Incremental SLAM via Information-Guided and Selective Optimization

We present an efficient incremental SLAM back-end that achieves the accuracy of full batch optimization while substantially reducing computational cost. The proposed approach combines two complementary ideas: information-guided gating (IGG) and selective partial optimization (SPO). IGG employs an information-theoretic criterion based...

💬 0 commentsarXiv:2601.08110v1PDF
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Posted in cs.LG · 2026-01-13 · Yuan Cheng, Fengzhuo Zhang, Yunlong Hou, Cunxiao Du, Chao Du, Tianyu Pang, Aixin Sun, Zhuoran Yang

Demystifying the Slash Pattern in Attention: The Role of RoPE

Large Language Models (LLMs) often exhibit slash attention patterns, where attention scores concentrate along the $Δ$-th sub-diagonal for some offset $Δ$. These patterns play a key role in passing information across tokens. But why do they emerge? In this paper, we demystify the emergence of these Slash-Dominant Heads (SDHs) from both...

💬 0 commentsarXiv:2601.08297v2PDF
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Posted in cs.CY · 2026-01-13 · Gregor Autischer, Kerstin Waxnegger, Dominik Kowald

Self-Certification of High-Risk AI Systems: The Example of AI-based Facial Emotion Recognition

The European Union's Artificial Intelligence Act establishes comprehensive requirements for high-risk AI systems, yet the harmonized standards necessary for demonstrating compliance remain not fully developed. In this paper, we investigate the practical application of the Fraunhofer AI assessment catalogue as a certification framework...

💬 0 commentsarXiv:2601.08295v1PDF
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Posted in cs.CV · 2026-01-13 · Yuze Zhang, Lingjie Li, Qiuzhen Lin, Zhong Ming, Fei Yu, Victor C. M. Leung

M3SR: Multi-Scale Multi-Perceptual Mamba for Efficient Spectral Reconstruction

The Mamba architecture has been widely applied to various low-level vision tasks due to its exceptional adaptability and strong performance. Although the Mamba architecture has been adopted for spectral reconstruction, it still faces the following two challenges: (1) Single spatial perception limits the ability to fully understand and...

💬 0 commentsarXiv:2601.08293v1PDF
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Posted in cs.CV · 2026-01-13 · Xianfeng Wang, Kaiwei Zhang, Qi Jia, Zijian Chen, Guangtao Zhai, Xiongkuo Min

KidVis: Do Multimodal Large Language Models Possess the Visual Perceptual Capabilities of a 6-Year-Old?

While Multimodal Large Language Models (MLLMs) have demonstrated impressive proficiency in high-level reasoning tasks, such as complex diagrammatic interpretation, it remains an open question whether they possess the fundamental visual primitives comparable to human intuition. To investigate this, we introduce KidVis, a novel...

💬 0 commentsarXiv:2601.08292v1PDF
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Posted in cs.AI · 2026-01-13 · Yuyang Wu, Hanzhong Cao, Jianhao Chen, Yufei Li

OpenMic: A Multi-Agent-Based Stand-Up Comedy Generation System

Chinese stand-up comedy generation goes beyond plain text generation, requiring culturally grounded humor, precise timing, stage-performance cues, and implicit multi-step reasoning. Moreover, commonly used Chinese humor datasets are often better suited for humor understanding and evaluation than for long-form stand-up generation,...

💬 0 commentsarXiv:2601.08288v1PDF
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Posted in cs.HC · 2026-01-13 · Jiaman He, Marta Micheli, Damiano Spina, Dana McKay, Johanne R. Trippas, Noriko Kando

Characterizing Personality from Eye-Tracking: The Role of Gaze and Its Absence in Interactive Search Environments

Personality traits influence how individuals engage, behave, and make decisions during the information-seeking process. However, few studies have linked personality to observable search behaviors. This study aims to characterize personality traits through a multimodal time-series model that integrates eye-tracking data and gaze...

💬 0 commentsarXiv:2601.08287v1PDF
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Posted in cs.IR · 2026-01-13 · Heba Shakeel, Tanvir Ahmad, Tanya Liyaqat, Chandni Saxena

AgriLens: Semantic Retrieval in Agricultural Texts Using Topic Modeling and Language Models

As the volume of unstructured text continues to grow across domains, there is an urgent need for scalable methods that enable interpretable organization, summarization, and retrieval of information. This work presents a unified framework for interpretable topic modeling, zero-shot topic labeling, and topic-guided semantic retrieval...

💬 0 commentsarXiv:2601.08283v1PDF
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Posted in cs.CL · 2026-01-13 · Kangcheng Luo, Tinglang Wu, Yansong Feng

D$^2$Plan: Dual-Agent Dynamic Global Planning for Complex Retrieval-Augmented Reasoning

Recent search-augmented LLMs trained with reinforcement learning (RL) can interleave searching and reasoning for multi-hop reasoning tasks. However, they face two critical failure modes as the accumulating context becomes flooded with both crucial evidence and irrelevant information: (1) ineffective search chain construction that...

💬 0 commentsarXiv:2601.08282v1PDF
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Posted in cs.AI · 2026-01-13 · Angshul Majumdar

Greedy Is Enough: Sparse Action Discovery in Agentic LLMs

Modern agentic systems operate in environments with extremely large action spaces, such as tool-augmented language models with thousands of available APIs or retrieval operations. Despite this scale, empirical evidence suggests that only a small subset of actions meaningfully influences performance in a given deployment. Motivated by...

💬 0 commentsarXiv:2601.08280v1PDF
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Posted in cs.CV · 2026-01-13 · Janis Mohr, Jörg Frochte

One-Shot Identification with Different Neural Network Approaches

Convolutional neural networks (CNNs) have been widely used in the computer vision community, significantly improving the state-of-the-art. But learning good features often is computationally expensive in machine learning settings and is especially difficult when there is a lack of data. One-shot learning is one such area where only...

💬 0 commentsarXiv:2601.08278v1PDF
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Posted in cs.DC · 2026-01-13 · Yizhuo Rao, Xingjian Cui, Jiabin Xie, Shangzhi Pang, Guangnan Feng, Jinhui Wei, Zhiguang Chen, Yutong Lu

Matrix-PIC: Harnessing Matrix Outer-product for High-Performance Particle-in-Cell Simulations

Particle-in-Cell (PIC) simulations spend most of their execution time on particle--grid interactions, where fine-grained atomic updates become a major bottleneck on traditional many-core CPUs. Recent CPU architectures integrate specialized Matrix Processing Units (MPUs) that efficiently support matrix outer-product operations,...

💬 0 commentsarXiv:2601.08277v1PDF
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Posted in cs.AI · 2026-01-13 · Zhiyuan Yao, Zishan Xu, Yifu Guo, Zhiguang Han, Cheng Yang, Shuo Zhang, Weinan Zhang, Xingshan Zeng, Weiwen Liu

ACE-Router: Generalizing History-Aware Routing from MCP Tools to the Agent Web

With the rise of the Agent Web and Model Context Protocol (MCP), the agent ecosystem is evolving into an open collaborative network, exponentially increasing accessible tools. However, current architectures face severe scalability and generality bottlenecks. To address this, we propose ACE-Router, a pipeline for training history-aware...

💬 0 commentsarXiv:2601.08276v2PDF
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Posted in cs.IR · 2026-01-13 · Cong Xu, Guoliang Li, Jun Wang, Wei Zhang

Markovian Pre-Trained Transformer for Next-Item Recommendation

We introduce the Markovian Pre-trained Transformer (MPT) for next-item recommendation, a transferable model fully pre-trained on synthetic Markov chains, yet capable of achieving state-of-the-art performance by fine-tuning a lightweight adaptor. This counterintuitive success stems from the observation of the `Markovian' nature:...

💬 0 commentsarXiv:2601.08275v1PDF
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Posted in cs.CL · 2026-01-13 · Kun Li, Zenan Xu, Junan Li, Zengrui Jin, Jinghao Deng, Zexuan Qiu, Bo Zhou

Discovery and Reinforcement of Tool-Integrated Reasoning Chains via Rollout Trees

Tool-Integrated Reasoning has emerged as a key paradigm to augment Large Language Models (LLMs) with computational capabilities, yet integrating tool-use into long Chain-of-Thought (long CoT) remains underexplored, largely due to the scarcity of training data and the challenge of integrating tool-use without compromising the model's...

💬 0 commentsarXiv:2601.08274v2PDF
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Posted in cs.CV · 2026-01-13 · Qitan Lv, Tianyu Liu, Wen Wu, Xuenan Xu, Bowen Zhou, Feng Wu, Chao Zhang

HIPPO: Accelerating Video Large Language Models Inference via Holistic-aware Parallel Speculative Decoding

Speculative decoding (SD) has emerged as a promising approach to accelerate LLM inference without sacrificing output quality. Existing SD methods tailored for video-LLMs primarily focus on pruning redundant visual tokens to mitigate the computational burden of massive visual inputs. However, existing methods do not achieve inference...

💬 0 commentsarXiv:2601.08273v1PDF
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Posted in cs.AI · 2026-01-13 · Angshul Majumdar

Sparsity Is Necessary: Polynomial-Time Stability for Agentic LLMs in Large Action Spaces

Tool-augmented LLM systems expose a control regime that learning theory has largely ignored: sequential decision-making with a massive discrete action universe (tools, APIs, documents) in which only a small, unknown subset is relevant for any fixed task distribution. We formalize this setting as Sparse Agentic Control (SAC), where...

💬 0 commentsarXiv:2601.08271v1PDF
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Posted in cs.CL · 2026-01-13 · Fan Gao, Sherry T. Tong, Jiwoong Sohn, Jiahao Huang, Junfeng Jiang, Ding Xia, Piyalitt Ittichaiwong, Kanyakorn Veerakanjana, Hyunjae Kim, Qingyu Chen, Edison Marrese Taylor, Kazuma Kobayashi, Akiko Aizawa, Irene Li

Med-CoReasoner: Reducing Language Disparities in Medical Reasoning via Language-Informed Co-Reasoning

While reasoning-enhanced large language models perform strongly on English medical tasks, a persistent multilingual gap remains, with substantially weaker reasoning in local languages, limiting equitable global medical deployment. To bridge this gap, we introduce Med-CoReasoner, a language-informed co-reasoning framework that elicits...

💬 0 commentsarXiv:2601.08267v3PDF
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Posted in cs.CV · 2026-01-13 · Sebastian L. Cocks, Salvador Dreo, Brian Ng, Feras Dayoub

AIMC-Spec: A Benchmark Dataset for Automatic Intrapulse Modulation Classification under Variable Noise Conditions

A lack of standardized datasets has long hindered progress in automatic intrapulse modulation classification (AIMC), a critical task in radar signal analysis for electronic support systems, particularly under noisy or degraded conditions. AIMC seeks to identify the modulation type embedded within a single radar pulse from its complex...

💬 0 commentsarXiv:2601.08265v2PDF
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Posted in cs.AI · 2026-01-13 · Subham Sharma, Sharmila Subudhi

VGG Induced Deep Hand Sign Language Detection

Hand gesture recognition is an important aspect of human-computer interaction. It forms the basis of sign language for the visually impaired people. This work proposes a novel hand gesture recognizing system for the differently-abled persons. The model uses a convolutional neural network, known as VGG-16 net, for building a trained...

💬 0 commentsarXiv:2601.08262v1PDF
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Posted in cs.LG · 2026-01-13 · Francesco Speziale, Ugo Lomoio, Fabiola Boccuto, Pierangelo Veltri, Pietro Hiram Guzzi

A Usable GAN-Based Tool for Synthetic ECG Generation in Cardiac Amyloidosis Research

Cardiac amyloidosis (CA) is a rare and underdiagnosed infiltrative cardiomyopathy, and available datasets for machine-learning models are typically small, imbalanced and heterogeneous. This paper presents a Generative Adversarial Network (GAN) and a graphical command-line interface for generating realistic synthetic electrocardiogram...

💬 0 commentsarXiv:2601.08260v1PDF
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Posted in cs.NI · 2026-01-13 · Yinqiu Liu, Ruichen Zhang, Dusit Niyato, Abbas Jamalipour, Trung Q. Duong, Dong In Kim

Unleashing Tool Engineering and Intelligence for Agentic AI in Next-Generation Communication Networks

Nowadays, agentic AI is emerging as a transformative paradigm for next-generation communication networks, promising to evolve large language models (LLMs) from passive chatbots into autonomous operators. However, unleashing this potential requires bridging the critical gap between abstract reasoning and physical actuation, a...

💬 0 commentsarXiv:2601.08259v1PDF
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Posted in cs.AI · 2026-01-13 · Edward Y. Chang

Diagnosing and Mitigating Sycophancy and Skepticism in LLM Causal Judgment

Large language models increasingly fail in a way that scalar accuracy cannot diagnose: they produce a sound reasoning trace and then abandon it under social pressure or an authoritative hint. We argue that this is a control failure, not a knowledge failure, and that it requires an evaluation surface richer than a single accuracy...

💬 0 commentsarXiv:2601.08258v3PDF
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Posted in cs.LG · 2026-01-13 · Gyu-Il Kim, Dae-Won Kim, Jaesung Lee

On Evaluation of Unsupervised Feature Selection for Pattern Classification

Unsupervised feature selection aims to identify a compact subset of features that captures the intrinsic structure of data without supervised label. Most existing studies evaluate the performance of methods using the single-label dataset that can be instantiated by selecting a label from multi-label data while maintaining the original...

💬 0 commentsarXiv:2601.08257v3PDF