نتایج جستجو برای: convex hull

تعداد نتایج: 60150  

2004
MATTHIAS REITZNER

Let K be a smooth convex set. The convex hull of independent random points in K is a random polytope. Central limit theorems for the volume and the number of i dimensional faces of random polytopes are proved as the number of random points tends to infinity. One essential step is to determine the precise asymptotic order of the occurring variances.

2005
Pier Luca Lanzi Stewart W. Wilson

We introduce a novel representation of classifier conditions based on convex hulls. A classifier condition is represented by a sets of points in the problem space. These points identify a convex hull that delineates a convex region of the problem space. The condition matches all the problem instances inside such region. We apply XCSF with convex conditions to function approximation problems and...

1994
Pradipta Bandyopadhyay P. Bandyopadhyay

K. S. Lau had shown that a reflexive Banach space has the Mazur Intersection Property (MIP) if and only if every closed bounded convex set is the closed convex hull of its farthest points. In this work, we show that in general this latter property is equivalent to a property stronger than the MIP. As corollaries, we recapture the result of Lau and characterize the w*-MIP in dual of RNP spaces.

Journal: :American Journal of Computational Mathematics 2013

2007
D. A. Darling

1. The convex hull of a random sample may be considered as one possible analogue of the range of a one-dimensional sample. Recent work along this line has dealt with the expected number of vertices, faces, surface area and other quantities connected with the convex hull of n independently and identically distributed random points in the plane and in higher dimensions. See Renyi and Salanke [6] ...

Journal: :Discrete Applied Mathematics 2009
Henrik Schulz

In this paper we introduce an algorithm for the creation of polyhedral approximations for certain kinds of digital objects in a three-dimensional space. The objects are sets of voxels represented as strongly connected subsets of an abstract cell complex. The proposed algorithm generates the convex hull of a given object and modifies the hull afterwards by recursive repetitions of generating con...

2017
Anton Mishkinis Christian Gentil Sandrine Lanquetin Dmitry Sokolov

In this paper, we present an algorithm to construct an approximate convex hull of the attractors of an affine iterated function system (IFS). We construct a sequence of convex hull approximations for any required precision using the self-similarity property of the attractor in order to optimize calculations. Due to the affine properties of IFS transformations, the number of points considered in...

2008
Megan Schuster

The largest empty circle (LEC) problem is defined on a set P and consists of finding the largest circle that contains no points in P and is also centered inside the convex hull of P . The LEC is always centered at either a vertex on the Voronoi diagram for P or on an intersection between a Voronoi edge and the convex hull of P . Thus, finding the LEC consists of constructing a Voronoi diagram a...

2012
Dave Mount

Problem 1. As mentioned in class, the convex hull is a somewhat non-robust shape descriptor, since if there are any distant outlying points, they will tend to dominate the shape of the hull. A more robust method is based on the following iterative approach. Given a planar point set P in general position (see Fig. 1(a)), let H1 be the convex hull of P . Remove the vertices of H1 from P and compu...

Journal: :Discrete & Computational Geometry 2004

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