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A natural analogue to angles and trigonometry is developed in taxicab geometry. This structure is then analyzed to see which, if any, congruent triangle relations hold. A nice application involving the use of parallax to determine the exact…

Metric Geometry · Mathematics 2025-06-23 Kevin Thompson , Tevian Dray

A pedagogical but concise overview of Riemannian geometry is provided, in the context of usage in physics. The emphasis is on defining and visualizing concepts and relationships between them, as well as listing common confusions,…

General Relativity and Quantum Cosmology · Physics 2022-08-19 Adam Marsh

Triangulations of a product of two simplices and, more generally, of root polytopes are closely related to Gelfand-Kapranov-Zelevinsky's theory of discriminants, to tropical geometry, tropical oriented matroids, and to generalized…

Combinatorics · Mathematics 2018-03-19 Pavel Galashin , Gleb Nenashev , Alexander Postnikov

Graph Neural Networks (GNNs) have emerged as the leading paradigm for learning over graph-structured data. However, their performance is limited by issues inherent to graph topology, most notably oversquashing and oversmoothing. Recent…

Machine Learning · Computer Science 2025-08-29 Hugo Attali , Thomas Papastergiou , Nathalie Pernelle , Fragkiskos D. Malliaros

The gauge fixed polygon model of 2+1 gravity with zero cosmological constant and arbitrary number of spinless point particles is reconstructed from the first order formalism of the theory in terms of the triad and the spin connection. The…

General Relativity and Quantum Cosmology · Physics 2009-11-10 Z. Kadar

The fundamental matrix and trifocal tensor are convenient algebraic representations of the epipolar geometry of two and three view configurations, respectively. The estimation of these entities is central to most reconstruction algorithms,…

Computer Vision and Pattern Recognition · Computer Science 2011-04-01 Stuart B. Heinrich , Wesley E. Snyder

A new procedure for coarse-graining dynamical triangulations is presented. The procedure provides a meaning for the relevant value of observables when "probing at large scales", e.g. the average scalar curvature. The scheme may also be…

General Relativity and Quantum Cosmology · Physics 2010-04-30 Joe Henson

The gauge function, closely related to the atomic norm, measures the complexity of a statistical model, and has found broad applications in machine learning and statistical signal processing. In a high-dimensional learning problem, the…

Optimization and Control · Mathematics 2022-03-11 Armin Eftekhari , Peyman Mohajerin Esfahani

An important problem in geometric reasoning is to find the configuration of a collection of geometric bodies so as to satisfy a set of given constraints. Recently, it has been suggested that this problem can be solved efficiently by…

Artificial Intelligence · Computer Science 2009-09-25 S. Bhansali , G. A. Kramer , T. J. Hoar

The concept of pointed pseudo-triangulations is defined and a few of its applications described.

Computational Geometry · Computer Science 2007-05-23 Joseph O'Rourke

In this paper we study a metric generalization of the sine function which can be extended to arbitrary normed planes. We derive its main properties and give also some characterizations of Radon planes. Furthermore, we prove that the…

Metric Geometry · Mathematics 2016-01-26 Vitor Balestro , Horst Martini , Ralph Teixeira

It is often difficult to learn new mathematics semantically and syntactically, even when there are similarities in the words and meaning when discussed aloud. The goal of this document is to facilitate learning through explanations and…

Other Computer Science · Computer Science 2019-04-05 Lenore Mullin , Paul Sebexen

The maximum principle is one of the most important tools in the analysis of geometric partial differential equations. Traditionally, the maximum principle is applied to a scalar function defined on a manifold, but in recent years more…

Differential Geometry · Mathematics 2014-02-18 S. Brendle

We consider the problem of computing a triangulation of the real projective plane P2, given a finite point set S={p1, p2,..., pn} as input. We prove that a triangulation of P2 always exists if at least six points in S are in general…

Computational Geometry · Computer Science 2011-11-10 Mridul Aanjaneya , Monique Teillaud

Physical geometry studies mutual disposition of geometrical objects and points in space, or space-time, which is described by the distance function d, or by the world function \sigma =d^{2}/2. One suggests a new general method of the…

General Physics · Physics 2007-05-23 Yuri A. Rylov

In these lectures we review the basic structure of Poincare gauge theory of gravity, with emphasis on its fundamental principles and geometric interpretation. A specific limit of this theory, defined by the teleparallel geometry of…

General Relativity and Quantum Cosmology · Physics 2011-01-17 M. Blagojevic

Simple function classes have emerged as toy problems to better understand in-context-learning in transformer-based architectures used for large language models. But previously proposed simple function classes like linear regression or…

Machine Learning · Computer Science 2024-07-30 Max Wilcoxson , Morten Svendgård , Ria Doshi , Dylan Davis , Reya Vir , Anant Sahai

Research project "Platform-independent approach to formal specification and verification of standard mathematical functions" is aimed onto a development of an incremental combined approach to the specification and verification of the…

Logic in Computer Science · Computer Science 2019-01-14 Nikolay V. Shilov , Boris L. Faifel , Svetlana O. Shilova , Aleksey V. Promsky

This extended abstract is about an effort to build a formal description of a triangulation algorithm starting with a naive description of the algorithm where triangles, edges, and triangulations are simply given as sets and the most complex…

Logic in Computer Science · Computer Science 2018-09-05 Yves Bertot

Let $f_n$ be a function assigning weight to each possible triangle whose vertices are chosen from vertices of a convex polygon $P_n$ of $n$ sides. Suppose ${\mathcal T}_n$ is a random triangulation, sampled uniformly out of all possible…

Combinatorics · Mathematics 2020-01-03 Toufik Mansour , Reza Rastegar