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We investigate the computational complexity of computing the Hausdorff distance. Specifically, we show that the decision problem of whether the Hausdorff distance of two semi-algebraic sets is bounded by a given threshold is complete for…

Computational Geometry · Computer Science 2022-08-26 Paul Jungeblut , Linda Kleist , Tillmann Miltzow

The Hausdorff distance measures how far apart two sets are in a common metric space. By contrast, the Gromov-Hausdorff distance provides a notion of distance between two abstract metric spaces. How do these distances behave for quotients of…

We prove that, for every norm on $\mathbb{R}^d$ and every $E \subseteq \mathbb{R}^d$, the Hausdorff dimension of the distance set of $E$ with respect to that norm is at least $\dim_{\mathrm{H}} E - (d-1)$. An explicit construction follows,…

Classical Analysis and ODEs · Mathematics 2024-11-05 Iqra Altaf , Ryan Bushling , Bobby Wilson

The Hausdorff distance is a metric commonly used to compute the set similarity of geometric sets. For sets containing a total of $n$ points, the exact distance can be computed na\"{i}vely in $O(n^2)$ time. In this paper, we show how to…

Computational Geometry · Computer Science 2025-05-16 Oliver A. Chubet , Parth M. Parikh , Donald R. Sheehy , Siddharth S. Sheth

Hausdorff and Gromov distances are introduced and treated in the context of categories enriched over a commutative unital quantale V. The Hausdorff functor which, for every V-category X, provides the powerset of X with a suitable V-category…

Category Theory · Mathematics 2009-01-07 Andrei Akhvlediani , Maria Manuel Clementino , Walter Tholen

Let $G$ be a finite, connected metric graph and let $X\subseteq G$ be a subset. If $X$ is sufficiently dense in $G$, we show that the Gromov--Hausdorff distance matches the Hausdorff distance, namely $d_\gh(G,X)=d_\h(G,X)$. When the metric…

Metric Geometry · Mathematics 2025-12-24 Henry Adams , Sushovan Majhi , Fedor Manin , Žiga Virk , Nicolò Zava

This paper develops a new integrated ball (pseudo)metric which provides an intermediary between a chosen starting (pseudo)metric d and the L_p distance in general function spaces. Selecting d as the Hausdorff or Fr\'echet distances, we…

Metric Geometry · Mathematics 2022-09-26 Sami Helander , Petra Laketa , Pauliina Ilmonen , Stanislav Nagy , Germain Van Bever , Lauri Viitasaari

The Gromov-Hausdorff distance $(d_{GH})$ proves to be a useful distance measure between shapes. In order to approximate $d_{GH}$ for compact subsets $X,Y\subset\mathbb{R}^d$, we look into its relationship with $d_{H,iso}$, the infimum…

Metric Geometry · Mathematics 2024-05-28 Sushovan Majhi , Jeffrey Vitter , Carola Wenk

The purpose of this paper is twofold. On a technical side, we propose an extension of the Hausdorff distance from metric spaces to spaces equipped with asymmetric distance measures. Specifically, we focus on the family of Bregman…

Machine Learning · Computer Science 2025-04-11 Tuyen Pham , Hana Dal Poz Kouřimská , Hubert Wagner

We introduce a distance function between simplicial complexes and study several of its properties.

Algebraic Topology · Mathematics 2020-02-03 Ivan Marin

We consider two disjoint sets of points. If at least one of the sets can be embedded into an Euclidean space, then we provide sufficient conditions for the two sets to be jointly embedded in one Euclidean space. In this joint Euclidean…

General Mathematics · Mathematics 2023-09-06 N. Alexia Raharinirina , Konstantin Fackeldey , Marcus Weber

The purpose of this paper is to give a survey on the notions of distance between subsets either of a metric space or of a measure space, including definitions, a classification, and a discussion of the best-known distance functions, which…

Functional Analysis · Mathematics 2018-08-09 A. Conci , C. S. Kubrusly

A finite set of distinct vectors $\mathcal{X}$ in the $d$-dimensional Euclidean space $\mathbb{R}^d$ is called an $s$-distance set if the set of mutual distances between distinct elements of $\mathcal{X}$ has cardinality $s$. In this paper…

Metric Geometry · Mathematics 2018-04-18 Ferenc Szöllősi , Patric R. J. Östergård

In this paper we study Probability Measures (PM) from a functional point of view: we show that PMs can be considered as functionals (generalized functions) that belong to some functional space endowed with an inner product. This approach…

Methodology · Statistics 2015-04-08 Alberto Muñoz , Gabriel Martos , Javier González

We prove fixed point theorems in a space with a distance function that takes values in a partially ordered monoid. On the one hand, such an approach allows one to generalize some fixed point theorems in a broad class of spaces, including…

Functional Analysis · Mathematics 2026-03-24 Vladyslav Babenko , Vira Babenko , Oleg Kovalenko

The Gromov-Hausdorff distance ($d_\mathrm{GH}$) provides a natural way of quantifying the dissimilarity between two given metric spaces. It is known that computing $d_\mathrm{GH}$ between two finite metric spaces is NP-hard, even in the…

Metric Geometry · Mathematics 2021-10-08 Facundo Mémoli , Zane Smith , Zhengchao Wan

This article introduces the {\it strongly hit and far-miss as well as hit and strongly far miss hypertopologies on $\textrm{CL}(X)$ associated with} ${\mathscr{B}}$, a nonempty family of subsets on the topological space $X$. They result…

General Topology · Mathematics 2015-03-10 J. F. Peters , C. Guadagni

We establish the dimension version of Falconer's distance set conjecture for sets of equal Hausdorff and packing dimension (in particular, for Ahlfors-regular sets) in all ambient dimensions. In dimensions $d=2$ or $3$, we obtain the first…

Classical Analysis and ODEs · Mathematics 2024-08-14 Pablo Shmerkin , Hong Wang

Let $CLB_H(X)$ denote the hyperspace of closed bounded subsets of a metric space $X$, endowed with the Hausdorff metric topology. We prove, among others, that natural dense subspaces of $CLB_H(R^m)$ of all nowhere dense closed sets, of all…

General Topology · Mathematics 2012-10-23 Wieslaw Kubis , Katsuro Sakai

This paper makes a deep study of regular two-distance sets. A set of unit vectors $X$ in Euclidean space $\RR^n$ is said to be regular two-distance set if the inner product of any pair of its vectors is either $\alpha$ or $\beta$, and the…

Functional Analysis · Mathematics 2019-10-17 Peter G. Casazza , Tin T. Tran , Janet C. Tremain