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Many Body in General Relativity: A thermal equivalence principle

Physics > General Physics [Submitted on 31 May 2026] Title:Many Body in General Relativity: A thermal equivalence principle View PDF HTML (experimental)Abstract:We review the physics of many bodies in the context of general relativity. Starting from the stress energy tensor for one body, for a swarm of bodies, for a perfect fluid, we review relativistic hydrodynamics, kinetic theory, and statistical physics of $N$ identical bodies.

arXiv Physics 8d ago

Do Transformers Need Three Projections? Systematic Study of QKV Variants

Computer Science > Machine Learning [Submitted on 1 Jun 2026] Title:Do Transformers Need Three Projections? Systematic Study of QKV Variants View PDF HTML (experimental)Abstract:Transformers have become the standard solution for various AI tasks, with the query, key, and value (QKV) attention formulation playing a central role.

Hacker News 5d ago

Rotary GPU: Exploring Local Execution for Large MoE Models Under Limited VRAM

Performance [Submitted on 27 May 2026] Title:Rotary GPU: Exploring Local Execution Paths for Large Mixture-of-Experts Models Under Limited GPU Memory View PDF HTML (experimental)Abstract:Large language models have achieved remarkable capabilities through scaling, and this paper does not challenge that. It instead investigates a different question: once large models already exist, can they become more accessible to environments with substantially smaller hardware resources?

Hacker News 10d ago

Variational free complement method with Gaussian-expanded complement functions: convergence with fixed Gaussian expansion length

Physics > Chemical Physics [Submitted on 1 Jun 2026] Title:Variational free complement method with Gaussian-expanded complement functions: convergence with fixed Gaussian expansion length View PDF HTML (experimental)Abstract:For the free complement theory with Gaussian-expanded complement functions, the energy convergence of $n_\mathrm{G} = \mathrm{constant} < \infty, n\rightarrow\infty$ is discussed, where $n_\mathrm{G}$ is the number of the Gaussian functions in the STO-$n$G expansion.

arXiv Physics 8d ago

A pictorial introduction to differential geometry (2017)

Differential Geometry [Submitted on 21 Sep 2017] Title:A pictorial introduction to differential geometry, leading to Maxwell's equations as three pictures View PDFAbstract:In this article we present pictorially the foundation of differential geometry which is a crucial tool for multiple areas of physics, notably general and special relativity, but also mechanics, thermodynamics and solving differential equations. As all the concepts are presented as pictures, there are no equations in this...

Hacker News 10d ago

Can LLMs Beat Classical Hyperparameter Optimization Algorithms?

Computer Science > Machine Learning [Submitted on 25 Mar 2026 (v1), last revised 17 Apr 2026 (this version, v5)] Title:Can LLMs Beat Classical Hyperparameter Optimization Algorithms?

Hacker News 17h ago

Unified Controllable and Faithful Text-to-CAD Generation with LLMs

Computer Science > Computation and Language [Submitted on 27 Mar 2026] Title:PR-CAD: Progressive Refinement for Unified Controllable and Faithful Text-to-CAD Generation with Large Language Models View PDF HTML (experimental)Abstract:The construction of CAD models has traditionally relied on labor-intensive manual operations and specialized expertise. Recent advances in large language models (LLMs) have inspired research into text-to-CAD generation.

Hacker News 18h ago

Unsupervised Learning Based Focal Stack Camera Depth Estimation

Electrical Engineering and Systems Science > Image and Video Processing [Submitted on 14 Mar 2022 (v1), last revised 3 Jun 2026 (this version, v3)] Title:Unsupervised Learning Based Focal Stack Camera Depth Estimation View PDFAbstract:We propose an unsupervised deep learning based method to estimate depth from focal stack camera images. On the NYU-v2 dataset, our method achieves much better depth estimation accuracy compared to single-image based methods.

arXiv CS 2d ago

Tracing a powerful GNSS interference source over Europe

Electrical Engineering and Systems Science > Signal Processing [Submitted on 2 Jun 2026] Title:Chasing Lightning: Detecting, Characterizing, and Identifying a Powerful Space-Based GNSS Interference Source View PDF HTML (experimental)Abstract:This paper analyzes and identifies a space-based Global Navigation Satellite System (GNSS) interference source that has caused scores of powerful transient wide-area interference events over continental Europe, Greenland, and Canada since 2019.

Hacker News 4d ago

Nonlinear Arithmetic with SMTLIB Division is Undecidable

Computer Science > Logic in Computer Science [Submitted on 25 May 2026 (v1), last revised 3 Jun 2026 (this version, v3)] Title:Nonlinear Arithmetic with SMTLIB Division is Undecidable View PDF HTML (experimental)Abstract:We show that the nonlinear real arithmetic theory (NRA) as defined in the SMTLIB standard is undecidable.

arXiv CS 6d ago