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Mathematics Preprint PDF DOI

Epimorphisms of local cohomology modules, a general Peskine-Szpiro theorem, and an application to sheaf cohomology vanishing for thickenings

Andre Dosea, Majid Eghbali, Cleto B. Miranda-Neto · 2026

We study the surjectivity of certain maps involving local cohomology modules, which we can realize as a dual version of part of the investigation developed by Bhatt, Blickle, Lyubeznik, Singh and Zhan…

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AI & Data Science Preprint PDF DOI

And Quiet Does Not Flow the Don: Statistical Analysis of a Quarrel Between Nobel Prize Laureates

Nils Lid Hjort · 2026

The Nobel Prize in literature 1965 was awarded Mikhail Sholokhov (1905-1984), for the epic novel Tikhij Don about Cossack life and the birth of a new Soviet society (And Quiet Flows the Don, or The Qu…

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Physics Preprint PDF DOI

Discovery of the Solution to the "Einstein-Podolsky-Rosen Paradox"

Roman Schnabel · 2026

In 1935, Albert Einstein, Boris Podolsky and Nathan Rosen (EPR) published a thought experiment that is entirely correct, has been demonstrated in real experiments, and is now the most famous in quantu…

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Physics Preprint PDF DOI

Borns Rule from Reversible Evolution and Irreversible Outcomes

Oskar Axelsson · 2026

We show that the quadratic measure need not be postulated, but follows from the compatibility of two structural features of physical processes: linear reversible evolution prior to the formation of pe…

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Mathematics Preprint PDF DOI

Koch-Tataru theorem for 3D incompressible active nematic liquid crystals

Fan Yang · 2026

We investigate the incompressible hydrodynamic system of the active nematic liquid crystals in the Beris-Edwards framework. Although we focus on constant activity in this paper, the simplified system …

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Earth & Environmental Sciences Preprint PDF DOI

Assessing the ability of a stretched-grid deep-learning weather prediction model to capture physical balances

Francesco Pasquini, Michiel Baatsen, Bastien Francois, Natalie Theeuwes, Maurice Schmeits · 2026

Weather forecasting has traditionally relied on Numerical Weather Prediction (NWP) models, which simulate weather by solving the governing fluid equations. Recently, the emergence of Deep Learning Wea…

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Mathematics Preprint PDF DOI

Chv\'atal-Gomory Rounding of Eigenvector Inequalities for QCQPs

Santanu S. Dey, Nan Jiang, Aleksandr Kazachkov, Andrea Lodi, Gonzalo Munoz · 2026

We introduce and analyze a class of valid inequalities for nonconvex quadratically constrained optimization problems (QCQPs) which we call Eigen-CG inequalities. These inequalities are obtained by app…

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Mathematics Preprint PDF DOI

Extending Theorems of Boros and Menzer

Marek Balcerzak, Micha{l} Pop{l}awski · 2026

We extend results of Boros and Menzer on the alternative equation $f(x)f(y)=0$ for generalized polynomials $f$, and their theorems on the conditional inequality $f(x)f(y)\ge 0$ for generalized monomia…

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Mathematics Preprint PDF DOI

Structure-Preserving Integration for Magnetic Gaussian Wave Packet Dynamics

Sebastian Merk, Caroline Lasser · 2026

We develop structure-preserving time integration schemes for Gaussian wave packet dynamics associated with the magnetic Schr\"odinger equation. The variational Dirac--Frenkel formulation yields a fini…

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Physics Preprint PDF DOI

Wave-particle equilibria with heavy ions in weakly collisional space plasmas

Nicolas Villarroel-Sepulveda, Daniel Verscharen, Pablo S. Moya, Rodrigo A. Lopez, Kristopher G. Klein · 2026

Space plasmas are weakly collisional since characteristic time scales related to Coulomb collisions are much larger than those of Larmor gyration or wave--particle interactions. Thus, wave activity is…

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Physics Preprint PDF DOI

Wall slip effects on the fiber orientation of a short-fiber suspension in hyperbolic channel flow

Kostas D. Housiadas, Antony N. Beris, Suresh G. Advani · 2026

We investigate the effect of wall fluid slip on the orientation of non-Brownian, short, rigid, and high aspect ratio cylindrical fibers suspended in a Newtonian fluid in flow through a symmetric hyper…

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Engineering Preprint PDF DOI

On Channel Estimation for Group-Connected Beyond Diagonal RIS Assisted Multi-User MIMO Communication

Rui Wang, Junyuan Gao, Shuowen Zhang, Bruno Clerckx, Liang Liu · 2026

Beyond diagonal reconfigurable intelligent surface (BD-RIS) architectures offer superior beamforming gain over conventional diagonal RISs. However, the channel estimation overhead is the main hurdle f…

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Mathematics Preprint PDF DOI

Generating minimal redundant and maximal irredundant sets in incidence graphs

Emanuel Castelo, Jeremie Chalopin, Oscar Defrain, Simon Vilmin · 2026

It has been proved by Boros and Makino that there is no output-polynomial-time algorithm enumerating the minimal redundant sets or the maximal irredundant sets of a hypergraph, unless P=NP. The same q…

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Physics Preprint PDF DOI

Particle-in-Cell Methods for Simulations of Sheared, Expanding, or Escaping Astrophysical Plasma

Fabio Bacchini, Evgeny A. Gorbunov, Maximilien Peters de Bonhome, Paul Els, Konstantinos-Xanthos Argyropoulos, Minh Nhat Ly, Daniel Groselj · 2026

Particle-in-Cell (PIC) methods have achieved widespread recognition as simple and flexible approaches to model collisionless plasma physics in fully kinetic simulations of astrophysical environments. …

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Mathematics Preprint PDF DOI

Effective approximations of solutions to highly oscillatory diffusion equations from coarse measurements

Claude Le Bris, Frederic Legoll, Simon Ruget · 2026

We approximate a diffusion equation with highly oscillatory coefficients with a diffusion equation with constant coefficients. The approach is put in action in contexts where only partial information …

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Physics Preprint PDF DOI

GAMERA-OP: A three-dimensional finite-volume MHD solver for orthogonal curvilinear geometries

Hongyang Luo, Binzheng Zhang, Jiaxing Tian, Jinshu Cai, Junjie Chen, Enhao Feng, Zhiqi Zheng, Sheng Xi, John G. Lyon · 2026

We present GAMERA-OP (Orthogonal-Plus), a three-dimensional finite-volume magnetohydrodynamics (MHD) solver for orthogonal curvilinear geometries. The solver advances magnetic fields using constrained…

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Mathematics Preprint PDF DOI

Global smoothing of singular Fano and Calabi-Yau varieties

Anda Tenie · 2026

We study the problem of smoothing Fano and Calabi-Yau varieties with isolated rational lci singularities. For Fano varieties we show that any such $Y$ admits a deformation to a Fano variety with only …

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AI & Data Science Preprint PDF DOI

Private and interpretable clinical prediction with quantum-inspired tensor train models

Jose Ramon Pareja Monturiol, Juliette Sinnott, Roger G. Melko, Mohammad Kohandel · 2026

Machine learning in clinical settings must balance predictive accuracy, interpretability, and privacy. Models such as logistic regression (LR) offer transparency, while neural networks (NNs) provide g…

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Mathematics Preprint PDF DOI

Local Cohomological Defect and a Conjecture of Mustata-Popa

Andrew Burke · 2026

We prove a general result on the depth of Du Bois complexes of a singular variety. We apply it to prove a conjecture of Mustata-Popa and to study the local cohomological defect, extending results of O…

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Engineering Preprint PDF DOI

SORIS: A Self-Organized Reconfigurable Intelligent Surface Architecture for Wireless Communications

Evangelos Koutsonas, Alexandros-Apostolos A. Boulogeorgos, Stylianos E. Trevlakis, George C. Alexandropoulos, Theodoros A. Tsiftsis, Rui Zhang · 2026

In this paper, a new reconfigurable intelligent surface (RIS) hardware architecture, called self-organized RIS (SORIS), is proposed. The architecture incorporates a microcontroller connected to a sing…

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