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AI & Data Science Preprint PDF DOI

When 2D Tasks Meet 1D Serialization: On Serialization Friction in Structured Tasks

Chung-Hsiang Lo, Lu Li, Diji Yang, Tianyu Zhang, Yunkai Zhang, Yoshua Bengio, Yi Zhang · 2026

Large language models (LLMs) conventionally process structured inputs as 1D token sequences. While natural for prose, such linearization may introduce additional representational burden for tasks whos…

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Mathematics Preprint PDF DOI

A stellated tetrahedron that is probably not Rupert

Tony Zeng · 2026

A convex polyhedron is Rupert if a hole can be cut into it (making its genus $1$) such that an identical copy of the polyhedron can pass through the hole. Resolving a conjecture of Jerrard-Wetzel-Yuan…

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Physics Preprint PDF DOI

Basic linear algebra methods for quantum problems

Aaron Dayton, Kiana Gallagher, Sarah E. Huber, Thomas E. Baker · 2026

Making new methods for quantum problems often relies on using basic operations in linear algebra. Often these routines are hidden behind well-known libraries that have been optimized over decades. Att…

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Mathematics Preprint PDF DOI

Higher order Schr\"odinger operators

Federica Gregorio, Chiara Spina, Cristian Tacelli · 2026

In this paper we consider higher order Schr\"odinger operators $$\mathcal L u=Lu+Vu,$$ where $L$ denotes a fourth order operator and $V\geq 0$ a suitable potential. We initiate our analysis by conside…

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Physics Preprint PDF DOI

How Quantum Contextuality disappears in the Classical Limit

Arthur C. R. Dutra, Roberto D. Baldijao, Marcelo Terra Cunha · 2026

The emergence of classicality is fundamentally driven by the interaction between a quantum system and its environment. Foundational open-system approaches, notably the Caldeira-Leggett model, successf…

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Mathematics Preprint PDF DOI

Discrete Einstein metrics on trees

Shuliang Bai, Bobo Hua · 2026

We establish the existence and uniqueness of discrete Einstein metrics on trees under Lin-Lu-Yau Ricci curvature using Perron-Frobenius theory. Notably, the existence of a positive-curvature Einstein …

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Mathematics Preprint PDF DOI

Finite-Approximate Solvability of Linear Operator Equations

Nazim I. Mahmudov · 2026

We introduce and study the finite-approximate solvability of operator equations \(Lu = h\) in a Hilbert space setting, where a bounded operator \(L \colon U \to H\) is paired with a finite-dimensional…

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AI & Data Science Preprint PDF DOI

A Finite Mixture Failure-rate based Heterogeneous Step-stress Accelerated Life Testing (h-SSALT) Model

Pranoy Palit, Ayan Pal, Kiran Prajapat · 2026

Traditional step-stress accelerated life testing models assume that the test units originate from a homogeneous population. Recently, Lu and Kateri (2025) proposed a heterogeneous cumulative exposure …

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Physics Preprint PDF DOI

Re-examination of electronic structure of dilute Kondo transition-metal ions substituted into a Heavy Fermion compound

Kou Takubo, Shintaro Suzuki, Kohei Yamamoto, Kohei Yamagami, Masafumi Horio, Toshiaki Ina, Kiyohumi Nitta, Masaichiro Mizumaki, Eiji Ikenaga, Yosuke Matsumoto, Hiroki Wadati, Satoru Nakatsuji · 2026

Correlations between the localized and conductive spins/charges have been the central issue of various fascinating quantum phenomena found on itinerant electron systems. Here, the obvious multiplet st…

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Mathematics Preprint PDF DOI

Lagrangian Mean Curvature Equations on exterior domains

Jiguang Bao, Qinfeng Jiang · 2026

We introduce an extended exterior $(K,K^{\prime},\alpha_0)$--quasiconformal mapping method to study the asymptotic behavior at infinity of solutions to the supercritical phase Lagrangian mean curvatur…

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Physics Preprint PDF DOI

On the complementary roles of anisotropic crack density and anisotropic crack driving force in phase-field modeling of mixed-mode fracture

Guk Heon Kim, Minseo Kim, Kwangsan Chun, Jaemin Kim · 2026

Phase-field models for anisotropic fracture employ two complementary mechanisms: (i) the anisotropic crack density function, controlling direction-dependent fracture resistance, and (ii) the anisotrop…

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Physics Preprint PDF DOI

Density Functional Theory Study of Lanthanide Monoxides under High Pressure: Pressure-Induced B1-B2 Transition

Sergio Ferrari, Daniel Errandonea · 2026

Using density functional theory, we study the influence of hydrostatic pressure on the crystal structure of lanthanide monoxides, focusing on the monoxides formed by the fifteen elements of the lantha…

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Mathematics Preprint PDF DOI

Matching and intersection problems for non-trivial $r$-partite $r$-uniform hypergraphs

Peter Frankl, Jiaxi Nie · 2026

A central theme in extremal combinatorics is the study of the maximum number of edges in an $r$-uniform hypergraph ($r$-graph) with matching number at most $s$ (the Erd\H{o}s Matching Conjecture) or w…

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Physics Preprint PDF DOI

Surface-enhanced Raman scattering and density functional theory study of selected-lanthanide-citrate complexes (lanthanide: Tb, Dy, Ho, Er, Tm, Yb and Lu)

Hao Jin, Yuko S. Yamamoto · 2026

In this study, surface-enhanced Raman scattering (SERS) and density functional theory (DFT) calculations were combined to investigate the SERS spectra of Ln-citrate complexes (Ln: Tb, Dy, Ho, Er, Tm, …

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Computer Science Preprint PDF DOI

AniGen: Unified $S^3$ Fields for Animatable 3D Asset Generation

Yi-Hua Huang, Zi-Xin Zou, Yuting He, Chirui Chang, Cheng-Feng Pu, Ziyi Yang, Yuan-Chen Guo, Yan-Pei Cao, Xiaojuan Qi · 2026

Animatable 3D assets, defined as geometry equipped with an articulated skeleton and skinning weights, are fundamental to interactive graphics, embodied agents, and animation production. While recent 3…

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Mathematics Preprint PDF DOI

An Efficient Entropy Flow on Weighted Graphs: Theory and Applications

Juan Zhao, Jicheng Ma, Yunyan Yang, Liang Zhao · 2026

We propose a novel entropy flow on weighted graphs, which provides a principled framework that characterizes the evolution of probability distributions over graph structures while sharing geometric in…

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Computer Science Preprint PDF DOI

The Boolean surface area of polynomial threshold functions

Fan Chang, Joseph Slote, Alexander Volberg, Haonan Zhang · 2026

Polynomial threshold functions (PTFs) are an important low-complexity class of Boolean functions, with strong connections to learning theory and approximation theory. Recent work on learning and testi…

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Mathematics Preprint PDF DOI

A finite-sample Borel--Cantelli inequality under $m$-dependence

Chatchawan Panraksa · 2026

We prove an explicit finite-sample version of the Borel--Cantelli lemma under $m$-dependence. Given any $m$-dependent sequence of events $(A_k)_{1\leq k\leq N}$, we show that \[ \mathbb{P}\Bigl(\big…

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AI & Data Science Preprint PDF DOI

Same Graph, Different Likelihoods: Calibration of Autoregressive Graph Generators via Permutation-Equivalent Encodings

Laurits Fredsgaard, Aaron Thomas, Michael Riis Andersen, Mikkel N. Schmidt, Mahito Sugiyama · 2026

Autoregressive graph generators define likelihoods via a sequential construction process, but these likelihoods are only meaningful if they are consistent across all linearizations of the same graph. …

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AI & Data Science Preprint PDF DOI

PRISM-MCTS: Learning from Reasoning Trajectories with Metacognitive Reflection

Siyuan Cheng, Bozhong Tian, YanChao Hao, Zheng Wei · 2026

PRISM-MCTS: Learning from Reasoning Trajectories with Metacognitive Reflection Siyuan Cheng, Bozhong Tian, Yanchao Hao, Zheng Wei Published: 06 Apr 2026, Last Modified: 06 Apr 2026 ACL 2026 Findings C…

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