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Mathematics Preprint PDF DOI

Uncentred maximal operators with respect to half balls on Damek--Ricci spaces

Nikolaos Chalmoukis, Stefano Meda, Effie Papageorgiou, Federico Santagati · 2026

In this paper we study a variant of the uncentred Hardy--Littlewood maximal operator on Damek--Ricci spaces in which balls are replaced by suitable half balls. Perhaps surprisingly, such modified maxi…

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Engineering Preprint PDF DOI

Split over $n$ resource sharing problem: Are fewer capable agents better than many simpler ones?

Karthik Soma, Mohamed S. Talamali, Genki Miyauchi, Giovanni Beltrame, Heiko Hamann, Roderich Gross · 2026

In multi-agent systems, should limited resources be concentrated into a few capable agents or distributed among many simpler ones? This work formulates the split over $n$ resource sharing problem wher…

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Earth & Environmental Sciences Preprint PDF DOI

Correlation Between Lunar Surface and Exospheric Sodium: Effects of Albedo-Driven Temperature on Multilayer Sodium Reservoirs Rather Than Surface Abundance Variations

A. Devaraj, S. Narendranath, Sreeja. S. Kartha, Netra S. Pillai · 2026

Sodium (Na) is a moderately volatile element in the lunar exosphere, released from the surface through thermal and non-thermal processes. We present a combined analysis of Chandrayaan-2 CLASS surface …

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AI & Data Science Preprint PDF DOI

Below-Chance Blindness: Prompted Underperformance in Small LLMs Produces Positional Bias Rather than Answer Avoidance

Jon-Paul Cacioli · 2026

Detecting sandbagging--the deliberate underperformance on capability evaluations--is an open problem in AI safety. We tested whether symptom validity testing (SVT) logic from clinical malingering dete…

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Mathematics Preprint PDF DOI

Size-4 Counterexamples to the Sidon-Extension Conjecture

Tong Niu · 2026

A finite set $S \subset \mathbb{Z}$ is a \emph{Sidon set} if its pairwise differences are distinct. A \emph{perfect difference set} (PDS) of order $n$ is a set $B \subset \mathbb{Z}_v$ ($v = n^2 - n +…

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Computer Science Preprint PDF DOI

"We Wanted to Do Better Than the Law": Exploring UI/UX Designers' Privacy Advocacy in Practice

Keyu Yao, Jinghui Cheng, Jin L.C. Guo · 2026

Designers hold primary responsibility for shaping the user interface (UI) and user experience (UX) of a product. This role goes beyond aesthetics and usability, extending to the privacy outcomes of us…

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Engineering Preprint PDF DOI

Single-Cycle Multidirectional EOG Classification Faster than Human Reaction Time for Wearable Human-Computer Interactions

Tasnia Nabiha, Orthy Toor, Wakim Sajjad Sakib, Abdullah Bin Shams · 2026

Electrooculogram (EOG) is a non-invasive bio-signal generated by the potential difference between the retina and cornea during eye movement, and is widely utilized in Human-Computer Interaction (HCI) …

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Physics Preprint PDF DOI

The open-Universe signal: A model artifact rather than genuine curvature

Peng-Ju Wu · 2026

Recent late-Universe observations suggest an open Universe. If confirmed, such a departure from spatial flatness would carry profound implications for our understanding of cosmic inflation and the ult…

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AI & Data Science Preprint PDF DOI

V-GRPO: Online Reinforcement Learning for Denoising Generative Models Is Easier than You Think

Bingda Tang, Yuhui Zhang, Xiaohan Wang, Jiayuan Mao, Ludwig Schmidt, Serena Yeung-Levy · 2026

Aligning denoising generative models with human preferences or verifiable rewards remains a key challenge. While policy-gradient online reinforcement learning (RL) offers a principled post-training fr…

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AI & Data Science Preprint PDF DOI

Weighted Cumulative Residual Mathai-Haubold Entropy

Anija C.R, Smitha S, Sudheesh K. Kattumannil · 2026

In this paper, we introduce the weighted cumulative residual Mathai--Haubold entropy and establish its fundamental properties. A dynamic version is developed, and its behavior under linear transformat…

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AI & Data Science Preprint PDF DOI

Preferences of a Voice-First Nation: Large-Scale Pairwise Evaluation and Preference Analysis for TTS in Indian Languages

Srija Anand, Ashwin Sankar, Ishvinder Sethi, Aaditya Pareek, Kartik Rajput, Gaurav Yadav, Nikhil Narasimhan, Adish Pandya, Deepon Halder, Mohammed Safi Ur Rahman Khan, Praveen S V, Shobhit Banga, Mitesh M Khapra · 2026

Crowdsourced pairwise evaluation has emerged as a scalable approach for assessing foundation models. However, applying it to Text to Speech(TTS) introduces high variance due to linguistic diversity an…

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Computer Science Preprint PDF DOI

Feedback Over Form: Why Execution Feedback Matters More Than Pipeline Topology in 1-3B Code Generation

Charles Junichi McAndrews · 2026

Small language models (1-3B) are practical to run locally, but individually limited on harder code generation tasks. We ask whether composing them into pipelines can recover some of that lost capabili…

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Computer Science Preprint PDF DOI

CVEs With a CVSS Score Greater Than or Equal to 9

Lena Sinterhauf, Andreas A{ss}muth, Roland Kaltefleiter · 2026

Critical vulnerabilities with Common Vulnerability Scoring System scores of 9.0 or higher pose severe risks to organisations' information systems. Timely detection and remediation are essential to min…

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Earth & Environmental Sciences Preprint PDF DOI

Sub-Neptunes Show a Stronger Correlation with Cold Jupiters than Super-Earths Especially in Metal-rich Systems

Di-Chang Chen, Fei Dai, Bo Ma, Shang-Fei Liu, Cong Yu · 2026

Correlations between the inner small planets and cold giants encodes the formation and evolution of planetary systems. It remains unclear if the correlation differs on the two sides of the radius vall…

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AI & Data Science Preprint PDF DOI

When Active Learning Falls Short: An Empirical Study on Chemical Reaction Extraction

Simin Yu, Sufia Fathima · 2026

The rapid growth of chemical literature has generated vast amounts of unstructured data, where reaction information is particularly valuable for applications such as reaction predictions and drug desi…

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Computer Science Preprint PDF DOI

When Transparency Falls Short: Auditing Platform Moderation During a High-Stakes Election

Benedetta Tessa, Gautam Kishore Shahi, Amaury Trujillo, Stefano Cresci · 2026

During major political events, social media platforms encounter increased systemic risks. However, it is still unclear if and how they adjust their moderation practices in response. The Digital Servic…

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Physics Preprint PDF DOI

Rather than drafting, vortex capture dictates efficiency in three-hydrofoil schools

Pedro C. Ormonde, Yuanhang Zhu, Daniel Quinn, Keith W Moored · 2026

Three-dimensional experiments are presented on a school of three pitching hydrofoils. Two side-by-side leader foils maintain the same relative positions while the location of a third follower foil is …

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Computer Science Preprint PDF DOI

Architecture Matters More Than Scale: A Comparative Study of Retrieval and Memory Augmentation for Financial QA Under SME Compute Constraints

Jianan Liu, Jing Yang, Xianyou Li, Weiran Yan, Yichao Wu, Penghao Liang, Mengwei Yuan · 2026

The rapid adoption of artificial intelligence (AI) and large language models (LLMs) is transforming financial analytics by enabling natural language interfaces for reporting, decision support, and aut…

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AI & Data Science Preprint PDF DOI

Tool Learning Needs Nothing More Than a Free 8B Language Model

Chenming Tang, Hsiu-Yuan Huang, Weijie Liu, Junqiang Zheng, Saiyong Yang, Yunfang Wu · 2026

Reinforcement learning (RL) has become a prevalent paradigm for training tool calling agents, which typically requires online interactive environments. Existing approaches either rely on training data…

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Mathematics Preprint PDF DOI

Rado's covering problem for cubes and balls: a semi-survey

Gian Maria Dall'Ara, Adrian Dumitrescu · 2026

What is the largest constant $c\in [0,1]$ with the property that every finite collection $\mathcal{C}$ of axis-parallel squares in the plane admits a disjoint sub-collection $\mathcal{S}$ occupying at…

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