Abstract

We propose and analyze the stepwisesupplement� ofacovering (SWSC) method intended for con� structing a suboptimal sequence of coverings of the multidimensional unit sphere by neighborhoods of a finite number of points. The construction of such cov� erings is of great practical importance. Specifically, they can be used in the polyhedral approximation of multidimensional convex compact bodies (CCBs) based on the evaluation of their support function for directions defined by points generating a covering, for example, in the approximation of reachable sets of dynamical systems (1) and sets of reachable criteria vectors in multicriteria optimization problems (2, 3). Methods for constructing optimal coverings are available only in the twodimensional case. As a result, coverings that are far from being optimal are used in practice (e.g., coverings obtained by using multidi� mensional polar coordinates). In this paper, we describe the SWSC method and present results of a theoretical and experimental analysis of coverings produced by this method. More specifically, asymp� totic estimates for the ratio of the radii of an optimal covering and one constructed by the SWSC method are given and the radii of the SWSCbased coverings are compared with that of the coverings based on polar coordinates.

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