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math/9211216

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Title: A low-technology estimate in convex geometry
Authors: Greg Kuperberg (U Chicago)
Categories: math.MG Metric Geometry (math.FA Functional Analysis)
Comments: The abstract is adapted from the Math Review by Keith Ball, MR 93h:52010
Report number: Kuperberg migration 5/2002
Journal reference: Internat. Math. Res. Notices, 1992 (1992), no. 9, 181-183

Abstract: Let $K$ be an $n$-dimensional symmetric convex body with $n \ge 4$ and let $K\dual$ be its polar body. We present an elementary proof of the fact that $$(\Vol K)(\Vol K\dual)\ge \frac{b_n^2}{(\log_2 n)^n},$$ where $b_n$ is the volume of the Euclidean ball of radius 1. The inequality is asymptotically weaker than the estimate of Bourgain and Milman, which replaces the $\log_2 n$ by a constant. However, there is no known elementary proof of the Bourgain-Milman theorem.

Owner: Greg Kuperberg
Version 1: Sun, 1 Nov 1992 00:00:00 GMT

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