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Physics Preprint PDF DOI

UHECR doublets and their conditional association with nearby radio galaxies

Victor Barbosa Martins · 2026

The origin of ultra-high-energy cosmic rays (UHECRs) remains a fundamental question in astroparticle physics. While localized 3 $\sigma$ correlations with active galactic nuclei and starburst galaxies…

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Mathematics Preprint PDF DOI

Piercing all maximum cliques in hypergraphs

Andreas Holmsen, Attila Jung, Balazs Keszegh, Daniel G. Simon, Gabor Tardos · 2026

Graphs whose maximum clique size exceeds half of the total number of vertices satisfy a classical property: the family of their maximum sized cliques can be pierced by a single vertex. This result dat…

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AI & Data Science Preprint PDF DOI

Forecasting Ionospheric Irregularities on GNSS Lines of Sight Using Dynamic Graphs with Ephemeris Conditioning

Mert Can Turkmen, Eng Leong Tan, Yee Hui Lee · 2026

Most data-driven ionospheric forecasting models operate on gridded products, which do not preserve the time-varying sampling structure of satellite-based sensing. We instead model the ionosphere as a …

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AI & Data Science Preprint PDF DOI

PAWN: Piece Value Analysis with Neural Networks

Ethan Tang, Hasan Davulcu, Jia Zou, Zhongju Zhang · 2026

Predicting the relative value of any given chess piece in a position remains an open challenge, as a piece's contribution depends on its spatial relationships with every other piece on the board. We d…

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Computer Science Preprint PDF DOI

Combinatorial Contracts Through Demand Types

Elizabeth Baldwin, Paul Duetting, Michal Feldman, Maya Schlesinger · 2026

In the combinatorial action model of contract design, a principal delegates a complex project to an agent, incentivizing a subset of actions from a ground set of $n$ actions, via a linear contract. Co…

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Mathematics Preprint PDF DOI

On the $K$-extensions between Serre weights for unramified $\mathrm{GL}_3$

Yitong Wang · 2026

Let $p\geq5$ be a prime number. Let $L$ be a finite unramified extension of $\mathbb{Q}_p$ with ring of integers $\mathcal{O}_L$ and residue field $\mathbb{F}_q$. Given two Serre weights for $\mathrm{…

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Biology & Life Sciences Preprint PDF DOI

Influence of Plaque Characteristics on Stent Biomechanical Outcomes - A Case Study on Double Kissing Crush Coronary Stenting

Andrea Colombo, Dario Carbonarob, Mingzi Zhang, Chi Shen, Ankush Kapoor, Nigel Jepson, Claudio Chiastra, Susann Beier · 2026

Background Double Kissing (DK) Crush is a two-stent technique for complex coronary bifurcation lesions, yet the biomechanical influence of plaque on its performance remains poorly understood. This stu…

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Mathematics Preprint PDF DOI

Relative Serre duality for Coxeter groups

Colton Sandvik · 2026

It was conjectured by Gorsky, Hogancamp, Mellit, and Nakagane that the left and right adjoints of the parabolic induction functor between homotopy categories of Soergel bimodules associated to a finit…

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AI & Data Science Preprint PDF DOI

Understanding the Nature of Generative AI as Threshold Logic in High-Dimensional Space

Ilya Levin · 2026

This paper examines the role of threshold logic in understanding generative artificial intelligence. Threshold functions, originally studied in the 1960s in digital circuit synthesis, provide a struct…

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Mathematics Preprint PDF DOI

Between proper and square colorings of planar graphs with maximum degree at most four

Xujun Liu, Zihui Xu, Xin Zhang · 2026

An $i$-independent set is a vertex set whose pairwise distance is at least $i+1$. A proper (square) $k$-coloring of a graph $G$ is a partition of its vertex set into $k$ independent ($2$-independent) …

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Mathematics Preprint PDF DOI

Implication semilattice of 990 quasigroup equational laws

Bruno Le Floch · 2026

In his quest to disprove a claim by Peirce that all lattices are distributive, Ernst Schr\"oder considered 135 years ago a list of 990 equational laws on quasigroups, analogous to associativity, such …

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Computer Science Preprint PDF DOI

Navigational Thinking as an Emerging Paradigm of Computer Science in the Age of Generative AI

Ilya Levin · 2026

Generative AI systems produce meaning with a quality indistinguishable from - and occasionally surpassing - human performance, yet the epistemic mechanism through which this occurs remains poorly unde…

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AI & Data Science Preprint PDF DOI

VA-Calibration: Correcting for Algorithmic Misclassification in Estimating Cause Distributions

Sandipan Pramanik, Emily B. Wilson, Henry D. Kalter, Agbessi Amouzou, Robert E. Black, Li Liu, Jamie Perin, Abhirup Datta · 2026

Accurate estimation of cause-specific mortality fractions (CSMFs), the percentage of deaths attributable to each cause in a population, is essential for global health monitoring. Challenge arises beca…

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Computer Science Preprint PDF DOI

From Symbol to Meaning: Ontological and Philosophical Reflections on Large Language Models in Information Systems Engineering

Jose Palazzo Moreira de Oliveira · 2026

The advent of Large Language Models (LLMs) represents a turning point in the theoretical foundations of Information Systems Engineering. Beyond their technical significance, LLMs challenge the ontolog…

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AI & Data Science Preprint PDF DOI

Physics-informed offline reinforcement learning eliminates catastrophic fuel waste in maritime routing

Aniruddha Bora, Julie Chalfant, Chryssostomos Chryssostomidis · 2026

International shipping produces approximately 3% of global greenhouse gas emissions, yet voyage routing remains dominated by heuristic methods. We present PIER (Physics-Informed, Energy-efficient, Ris…

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Physics Preprint PDF DOI

Exploring memory-burdened primordial black holes with ultra-high-energy cosmic-rays

Antonio Ambrosone, Marco Chianese, Carmelo Evoli · 2026

Quantum backreaction effects may quench Hawking evaporation through a ``memory burden'', allowing primordial black holes (PBHs) with formation masses well below $10^{15}~\mathrm{g}$ to survive to the …

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Computer Science Preprint PDF DOI

VibeContract: The Missing Quality Assurance Piece in Vibe Coding

Song Wang · 2026

Recent advances in large language models (LLMs) have given rise to vibe coding, a style of software development where developers rely on AI coding assistants to generate, modify, and refactor code usi…

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Physics Preprint PDF DOI

Implications of a Cosmogenic Origin of KM3-230213A for Ultra-High-Energy Protons

A. R. Alhebsi, Arjen van Vliet, Domenik Ehlert, Satyendra Thoudam · 2026

A significant neutrino event with an estimated energy between $72\,\mathrm{PeV}$ and $2.6\,\mathrm{EeV}$ was recently observed by the KM3NeT experiment (KM3-230213A). When interpreted as cosmogenic in…

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Computer Science Preprint PDF DOI

Tetris is Hard with Just One Piece Type

MIT Hardness Group: Josh Brunner, Erik D. Demaine, Della Hendrickson, Jeffery Li · 2026

We analyze the computational complexity of Tetris clearing (determining whether the player can clear an initial board using a given sequence of pieces) and survival (determining whether the player can…

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Physics Preprint PDF DOI

Data reduction method for OPTICAM multiband time series of transiting exoplanets

S. Paez, Y. Gomez Maqueo Chew, L. H. Hebb · 2026

We present a methodology for acquiring and reducing transiting exoplanet light curves obtained with the OPTICAM instrument in the Observatorio Astron\'omico Nacional en la Sierra de San Pedro M\'artir…

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