Geodesic
Systematization of problems on ball estimates of a~convex compactum
Sbornik. Mathematics, Tome 206 (2015) no. 9, pp. 1260-1280

Voir la notice de l'article provenant de la source Math-Net.Ru

We consider a class of finite-dimensional problems on the estimation of a convex compactum by a ball of an arbitrary norm in the form of extremal problems whose goal function is expressed via the function of the distance to the farthest point of the compactum and the function of the distance to the nearest point of the compactum or its complement. Special attention is devoted to the problem of estimating (approximating) a convex compactum by a ball of fixed radius in the Hausdorff metric. It is proved that this problem plays the role of the canonical problem: solutions of any problem in the class under consideration can be expressed via solutions of this problem for certain values of the radius. Based on studying and using the properties of solutions of this canonical problem, we obtain ranges of values of the radius in which the canonical problem expresses solutions of the problems on inscribed and circumscribed balls, the problem of uniform estimate by a ball in the Hausdorff metric, the problem of asphericity of a convex body, the problems of spherical shells of the least thickness and of the least volume for the boundary of a convex body. This makes it possible to arrange the problems in increasing order of the corresponding values of the radius. Bibliography: 34 titles.
Keywords: ball estimates of a convex compactum, distance functions, Hausdorff metric, asphericity, subdifferential. 
@article{SM_2015_206_9_a2,
     author = {S. I. Dudov},
     title = {Systematization of problems on ball estimates of a~convex compactum},
     journal = {Sbornik. Mathematics},
     pages = {1260--1280},
     publisher = {mathdoc},
     volume = {206},
     number = {9},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2015_206_9_a2/}
}
TY  - JOUR
AU  - S. I. Dudov
TI  - Systematization of problems on ball estimates of a~convex compactum
JO  - Sbornik. Mathematics
PY  - 2015
SP  - 1260
EP  - 1280
VL  - 206
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2015_206_9_a2/
LA  - en
ID  - SM_2015_206_9_a2
ER  - 
%0 Journal Article
%A S. I. Dudov
%T Systematization of problems on ball estimates of a~convex compactum
%J Sbornik. Mathematics
%D 2015
%P 1260-1280
%V 206
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2015_206_9_a2/
%G en
%F SM_2015_206_9_a2
S. I. Dudov. Systematization of problems on ball estimates of a~convex compactum. Sbornik. Mathematics, Tome 206 (2015) no. 9, pp. 1260-1280. http://geodesic.mathdoc.fr/item/SM_2015_206_9_a2/