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We give a sharp lower bound to the largest possible Euclidean norm of signed sums of $n$ vectors in the plane. This is achieved by connecting the signed vector sum problem to the isoperimetric problem for the circumradius of polygons. In…

Metric Geometry · Mathematics 2025-02-20 Florian Grundbacher

Let $X$ be a normal projective variety defined over an algebraically closed field and let $Z$ be a subvariety. Let $D$ be an $\mathbb R$-Cartier $\mathbb R$-divisor on $X$. Given an expression $(\ast) \ D \sim_{\mathbb R} t_1 H_1 + \ldots +…

Algebraic Geometry · Mathematics 2015-10-28 Angelo Felice Lopez

Mixed volumes $V(K_1,\dots, K_d)$ of convex bodies $K_1,\dots ,K_d$ in Euclidean space $\mathbb{R}^d$ are of central importance in the Brunn-Minkowski theory. Representations for mixed volumes are available in special cases, for example as…

Metric Geometry · Mathematics 2017-09-20 Daniel Hug , Jan Rataj , Wolfgang Weil

This paper proves under certain conditions the existence of an algorithm, which detects relatively quasiconvex subgroups $H$ of relatively hyperbolic groups $(G,\mathbb{P})$. Additionally, this algorithm outputs an induced peripheral…

Group Theory · Mathematics 2022-03-08 Thomas Carstensen

Coverings of convex bodies have emerged as a central component in the design of efficient solutions to approximation problems involving convex bodies. Intuitively, given a convex body $K$ and $\epsilon> 0$, a covering is a collection of…

Computational Geometry · Computer Science 2023-03-16 Sunil Arya , Guilherme D. da Fonseca , David M. Mount

The identification, description, and classification of topological features is an engine of discovery and innovation in several fields of physics. This research encompasses a broad variety of systems, from the integer and fractional Chern…

Strongly Correlated Electrons · Physics 2025-02-04 Antonio M. García-García , Lucas Sá , Jacobus J. M. Verbaarschot , Can Yin

Inside the symmetric product of a very general curve, we consider the codimension-one subvarieties of symmetric tuples of points imposing exceptional secant conditions on linear series on the curve of fixed degree and dimension. We compute…

Algebraic Geometry · Mathematics 2016-02-03 Nicola Tarasca

Convex body domination is a technique, where operators acting on vector-valued functions are estimated via certain convex body averages of the input functions. This domination lets one deduce various matrix weighted bounds for these…

Classical Analysis and ODEs · Mathematics 2024-11-05 Aapo Laukkarinen

We study a class of semialgebraic convex bodies called discotopes. These are instances of zonoids, objects of interest in real algebraic geometry and random geometry. We focus on the face structure and on the boundary hypersurface of…

Algebraic Geometry · Mathematics 2025-06-02 Fulvio Gesmundo , Chiara Meroni

We give the sharp lower bound of the volume product of three dimensional convex bodies which are invariant under two kinds of discrete subgroups of $O(3)$ of order four. We also characterize the convex bodies with the minimal volume product…

Metric Geometry · Mathematics 2024-10-02 Hiroshi Iriyeh , Masataka Shibata

We study a notion of convex cocompactness for discrete subgroups of the projective general linear group acting (not necessarily irreducibly) on real projective space, and give various characterizations. A convex cocompact group in this…

Geometric Topology · Mathematics 2023-04-19 Jeffrey Danciger , François Guéritaud , Fanny Kassel

We introduce a new class of pseudoprimes. In this work we characterize Midy pseudoprimes, give some of their properties and established interesting connections with other known pseudoprimes, in particular we show that every divisor of a…

Number Theory · Mathematics 2012-03-08 John H. Castillo , Gilberto García-Pulgarín , Juan Miguel Velásquez-Soto

We study Poincare-Sobolev type inequalities for compactly supported smooth functions which are defined in the Euclidean $n$-space and whose absolute value of gradient are Choquet $\delta /n$-integrable with respect to the…

Analysis of PDEs · Mathematics 2026-04-16 Petteri Harjulehto , Ritva Hurri-Syrjänen

Cauchy's surface area formula says that for a convex body $K$ in $n$-dimensional Euclidean space the mean value of the $(n-1)$-dimensional volumes of the orthogonal projections of $K$ to hyperplanes is a constant multiple of the surface…

Metric Geometry · Mathematics 2023-07-25 Daniel Hug , Rolf Schneider

We investigate weighted floating bodies of polytopes. We show that the weighted volume depends on the complete flags of the polytope. This connection is obtained by introducing flag simplices, which translate between the metric and…

Metric Geometry · Mathematics 2018-05-30 Florian Besau , Carsten Schütt , Elisabeth M. Werner

We extend the notion of illumination bodies to Riemannian spaces of constant curvature and to projective Finsler geometries. We prove that the derivative of their volume defines a notion of surface area for convex bodies in these settings,…

Metric Geometry · Mathematics 2026-05-26 Rotem Assouline , Florian Besau , Elisabeth M. Werner

Let X be a smooth projective variety over an algebraically closed field of positive characteristic. We prove that if D is a pseudo-effective R-divisor on X which is not numerically equivalent to the negative part in its divisorial Zariski…

Algebraic Geometry · Mathematics 2013-06-13 Paolo Cascini , Christopher Hacon , Mircea Mustata , Karl Schwede

This article is devoted to level-1 large deviation properties in some nonuniformly hyperbolic systems via Pesin theory. In particular, our result can be applied to the nonuniformly hyperbolic diffeomorphisms described by Katok and several…

Dynamical Systems · Mathematics 2014-12-03 Zheng Yin , Ercai Chen

We show that the copolarity of pseudo-cones has analogous properties as the usual polarity of convex bodies.

Metric Geometry · Mathematics 2024-07-25 Rolf Schneider

The famous Minkowski inequality provides a sharp lower bound for the mixed volume $V(K,M[n-1])$ of two convex bodies $K,M\subset\mathbb{R}^n$ in terms of powers of the volumes of the individual bodies $K$ and $M$. The special case where $K$…

Metric Geometry · Mathematics 2020-12-04 Daniel Hug , Károly Böröczky