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We extend many theorems from the context of solid angle sums over rational polytopes to the context of solid angle sums over real polytopes. Moreover, we consider any real dilation parameter, as opposed to the traditional integer dilation…

Combinatorics · Mathematics 2007-08-02 David DeSario , Sinai Robins

In this work we survey four classic problems: Borsuk's partition problem, Tarski's plank problem, the Kneser--Poulsen problem on the monotonicity of the union of balls under a contraction of their centers, and the Hadwiger--Levi problem on…

Metric Geometry · Mathematics 2022-02-22 Gábor Fejes Tóth , Włodzimierz. Kuperberg

In this paper we study the class of so called `ball-bodies' in ${\mathbb R}^n$, given by intersections of translates of Euclidean unit balls (or, equivalently, summand of the Euclidean ball). We study the class along with the natural…

Metric Geometry · Mathematics 2025-05-20 Shiri Artstein-Avidan , Dan I. Florentin

The aim of the paper is to give a synthetic proof that in a symmetric Minkowski plane the Benz's (G) axiom holds (without using the algebraic representation).

Combinatorics · Mathematics 2007-05-23 Jaroslaw Kosiorek , Andrzej Matras

We consider exact solutions to the problem of ballistic aggregation in a flow of adhesive particles, providing a model for large-scale structure formation in cosmology within the framework of the Zel'dovich approximation. Two different…

Pattern Formation and Solitons · Physics 2007-07-19 A. Andrievskii , S. Gurbatov , A. Sobolevskii

Let V be an affine symmetric variety defined over Q. We compute the asymptotic distribution of the angular components of the integral points in V. This distribution is described by a family of invariant measures concentrated on the Satake…

Number Theory · Mathematics 2019-02-18 Alexander Gorodnik , Hee Oh , Nimish Shah

We prove that geodesic balls centered at some base point are isoperimetric in the real hyperbolic space $H_{\mathbb R}^n$ endowed with a smooth, radial, strictly log-convex density on the volume and perimeter. This is an analogue of the…

Differential Geometry · Mathematics 2022-09-26 Lauro Silini

Let K be a a Lie group, modeled on a locally convex space, and M a finite-dimensional paracompact manifold with corners. We show that each continuous principal K-bundle over M is continuously equivalent to a smooth one and that two smooth…

Differential Geometry · Mathematics 2012-06-29 Christoph Müller , Christoph Wockel

Adapting the recently developed randomized dyadic structures, we introduce the notion of spline function in geometrically doubling quasi-metric spaces. Such functions have interpolation and reproducing properties as the linear splines in…

Classical Analysis and ODEs · Mathematics 2012-04-27 Pascal Auscher , Tuomas Hytönen

In the paper [J. Combin. Theory Ser. A 43 (1986), 103--113], Stanley gives formulas for the number of plane partitions in each of ten symmetry classes. This paper together with results by Andrews [J. Combin. Theory Ser. A 66 (1994), 28-39]…

Combinatorics · Mathematics 2016-09-06 Greg Kuperberg

We present an algebro-geometric proof of the K-semistability of the projective plane.

Algebraic Geometry · Mathematics 2016-08-24 Jihun Park , Joonyeong Won

An elastic sheet lying on the surface of a liquid, if axially compressed, shows a transition from a smooth sinusoidal pattern to a well localized fold. This wrinkle-to-fold transition is a manifestation of a localized buckling. The…

Soft Condensed Matter · Physics 2013-03-06 Marco Rivetti

We shall prove a convergence result relative to sequences of Minkowski symmetrals of general compact sets. In particular, we investigate the case when this process is induced by sequences of subspaces whose elements belong to a finite…

Metric Geometry · Mathematics 2021-12-07 Jacopo Ulivelli

In this paper, we prove even symmetry of monotone traveling wave solutions to the balanced Allen-Cahn equation in the entire plane. Related results for the unbalanced Allen-Cahn equation are also discussed.

Analysis of PDEs · Mathematics 2015-05-27 Changfeng Gui

Given a convex set and an interior point close to the boundary, we prove the existence of a supporting hyperplane whose distance to the point is controlled, in a dimensionally quantified way, by the thickness of the convex set in the…

Analysis of PDEs · Mathematics 2011-07-07 Alessio Figalli , Young-Heon Kim , Robert J. McCann

The recent paper "A quantitative Doignon-Bell-Scarf Theorem" by Aliev et al. generalizes the famous Doignon-Bell-Scarf Theorem on the existence of integer solutions to systems of linear inequalities. Their generalization examines the number…

Optimization and Control · Mathematics 2017-09-01 Stephen R. Chestnut , Robert Hildebrand , Rico Zenklusen

We prove that stably isomorphic vector bundles of rank d-1 on a smooth affine d-fold X over an algebraically closed field k are indeed isomorphic, provided d! is invertible in k. This answers an old conjecture of Suslin.

Algebraic Geometry · Mathematics 2024-12-11 Jean Fasel

We develop variational regularization methods which leverage sparsity-promoting priors to solve severely ill posed inverse problems defined on the 3D ball (i.e. the solid sphere). Our method solves the problem natively on the ball and thus…

Information Theory · Computer Science 2021-05-13 Matthew A. Price , Jason D. McEwen

We prove that in every separable Banach space $X$ with a Schauder basis and a $C^k$-smooth norm it is possible to approximate, uniformly on bounded sets, every equivalent norm with a $C^k$-smooth one in a way that the approximation is…

Functional Analysis · Mathematics 2020-06-09 Petr Hájek , Tommaso Russo

We study some particular cases of the $n$-well problem in two-dimensional linear elasticity. Assuming that every well in $\mathcal{U}\subset\mathbb{R}^{2\times 2}_\text{sym}$ belong to the same two-dimensional affine subspace, we…

Analysis of PDEs · Mathematics 2021-02-04 Antonio Capella , Lauro Morales