Dual mixed volumes and the slicing problem |
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Authors: | Emanuel Milman |
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Institution: | Department of Mathematics, The Weizmann Institute of Science, Rehovot 76100, Israel |
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Abstract: | We develop a technique using dual mixed-volumes to study the isotropic constants of some classes of spaces. In particular, we recover, strengthen and generalize results of Ball and Junge concerning the isotropic constants of subspaces and quotients of Lp and related spaces. An extension of these results to negative values of p is also obtained, using generalized intersection-bodies. In particular, we show that the isotropic constant of a convex body which is contained in an intersection-body is bounded (up to a constant) by the ratio between the latter's mean-radius and the former's volume-radius. We also show how type or cotype 2 may be used to easily prove inequalities on any isotropic measure. |
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Keywords: | Slicing problem Isotropic constant Dual mixed volumes Generalized intersection bodies Type and cotype 2 |
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