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In this paper we study the subset sum problem with real numbers. Starting from the given problem, we formulate a quadratic maximization problem over a polytope which is eventually written as a distance maximization to a fixed point. For…

最优化与控制 · 数学 2023-10-09 Marius Costandin

In this paper, we mainly consider the problem of spherical distribution of 5 points, that is, how to configure 5 points on a sphere such that the mutual distance sum attains the maximum. It is conjectured that the sum of distances is…

离散数学 · 计算机科学 2009-06-05 Xiaorong Hou , Junwei Shao

In this paper we study the subset sum problem with real numbers. Starting from the given problem, we formulate a quadratic maximization problem over a polytope, P, which is eventually written as a distance maximization to a fixed point over…

最优化与控制 · 数学 2023-10-09 Marius Costandin

In this paper, we prove two theorems concerning the sums of squared distances between points on a unit $n$-sphere that generalize two facts previously known about the case where the points are the vertices of a regular polygon. The first…

度量几何 · 数学 2020-01-10 Jessica N. Copher

In this paper the problem of maximizing the distance to a given fixed point over an intersection of balls is considered. It is known that this problem is NP complete in the general case, since any subset sum problem can be solved upon…

最优化与控制 · 数学 2023-07-26 Marius Costandin

An exact upper bound on the sum of squared nearest-neighbor distances between points in a rectangle is given.

度量几何 · 数学 2019-04-26 Iosif Pinelis

We show that the maximum number of unit distances or of diameters in a set of n points in d-dimensional Euclidean space is attained only by specific types of Lenz constructions, for all d >= 4 and n sufficiently large, depending on d. As a…

度量几何 · 数学 2009-03-12 Konrad J Swanepoel

In this paper we study the problem of maximizing the distance to a given point over an intersection of balls. It was already known that this problem can be solved in polynomial time and space if the given point is not in the convex hull of…

最优化与控制 · 数学 2023-10-09 Marius Costandin , Beniamin Costandin

Let's have $n$ points in the space such that the maximum distance between any of them is $a$. We prove that there exists a sphere of radius $r \leq a \frac{\sqrt(6)}{4}$ that contains in its interior or on its surface all these points.…

综合数学 · 数学 2011-11-09 Florentin Smarandache

We prove a limit theorem for the the maximal interpoint distance (also called the diameter) for a sample of n i.i.d. points in the unit ball of dimension 2 or more. The exact form of the limit distribution and the required normalisation are…

概率论 · 数学 2007-05-23 Michael Mayer , Ilya Molchanov

Let $A_1,A_2,...,A_n$ be the vertices of a polygon with unit perimeter, that is $\sum_{i=1}^n |A_i A_{i+1}|=1$. We derive various tight estimates on the minimum and maximum values of the sum of pairwise distances, and respectively sum of…

度量几何 · 数学 2012-06-22 Adrian Dumitrescu

We consider the problem of choosing Euclidean points to maximize the sum of their weighted pairwise distances, when each point is constrained to a ball centered at the origin. We derive a dual minimization problem and show strong duality…

数据结构与算法 · 计算机科学 2010-07-02 Neal E. Young

For $ E\subset \mathbb{F}_q^d$, let $\Delta(E)$ denote the distance set determined by pairs of points in $E$. By using additive energies of sets on a paraboloid, Koh, Pham, Shen, and Vinh (2020) proved that if $E,F\subset \mathbb{F}_q^d $…

数论 · 数学 2020-08-20 Daewoong Cheong , Doowon Koh , Thang Pham

A point set $P \subset {\Bbb{R}}^d$ is {\it separated} if the minimum distance between any two points in $P$ is at least $1$. For $d \ne 4,5,$ we determine, for every $t_1,t_2 \ge 1$, and for $n$ at least a suitable $n_d$, the maximum…

度量几何 · 数学 2025-10-07 P. Erdős , E. Makai, , J. Pach

In this paper we study the NP-Hard problem of maximizing the distance over an intersection of balls to a given point. We expand the results found in \cite{funcos1}, where the authors characterize the farthest in an intersection of balls…

计算几何 · 计算机科学 2024-03-05 Beniamin Costandin , Marius Costandin

Huemer et al. (Discrete Math, 2019) proved that for any two finite point sets $R$ and $B$ in the plane with $|R| = |B|$, the perfect matching that matches points of $R$ with points of $B$, and maximizes the total squared Euclidean distance…

计算几何 · 计算机科学 2025-04-08 Oscar Chacón-Rivera , Pablo Pérez-Lantero

We present a novel feasibility criteria for the finite intersection of convex sets given by inequalities. This criteria allows us to easily assert the feasibility by analyzing the unconstrained minimum of a speci?fic convex function, that…

最优化与控制 · 数学 2020-12-18 Marius-Simion Costandin , Bogdan Gavrea , Beniamin Costandin

Finding an exact maximum distance of two points in the given set is a fundamental computational problem which is solved in many applications. This paper presents a fast, simple to implement and robust algorithm for finding this maximum…

数据结构与算法 · 计算机科学 2017-08-10 Vaclav Skala , Zuzana Majdisova

In this paper we study the problem of maximizing the distance to a given point $C_0$ over a polytope $\mathcal{P}$. Assuming that the polytope is circumscribed by a known ball we construct an intersection of balls which preserves the…

最优化与控制 · 数学 2024-03-05 Marius Costandin , Beniamin Costandin

The Erd\H os unit distance conjecture in the plane says that the number of pairs of points from a point set of size $n$ separated by a fixed (Euclidean) distance is $\leq C_{\epsilon} n^{1+\epsilon}$ for any $\epsilon>0$. The best known…

经典分析与常微分方程 · 数学 2017-09-26 Alex Iosevich
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