Abstract
The paper deals with a finite-dimensional problem of minimizing the ratio of the radius of the sphere circumscribed about a given convex body (in an arbitrary norm) to the radius of the inscribed sphere. The minimization is performed by choosing a common center of these spheres. We prove that the objective function of this problem is quasiconvex and subdifferentiable and establish a criterion for the unique solvability of the problem. The considered problem is compared with those close to it in geometric sense.
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