Displaying similar documents to “On some special surfaces connected with convex surfaces of the Lobachevskij space.”

Goffin's algorithm for zonotopes

Michal Černý (2012)

Kybernetika

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The Löwner-John ellipse of a full-dimensional bounded convex set is a circumscribed ellipse with the property that if we shrink it by the factor n (where n is dimension), we obtain an inscribed ellipse. Goffin’s algorithm constructs, in polynomial time, a tight approximation of the Löwner-John ellipse of a polyhedron given by facet description. In this text we adapt the algorithm for zonotopes given by generator descriptions. We show that the adapted version works in time polynomial...