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arXiv 1402.3250math.FA
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L_p-仿射表面积和熵不等式的泛函形式

Functional versions of L_p-affine surface area and entropy inequalities

U. Caglar, M. Fradelizi, O. Guedon, J. Lehec, C. Schuett, E. M. Werner

摘要:

在当代凸几何中,迅速发展起来的L_p-Brunn Minkowski理论是经典Brunn Minkowski理论的现代类比。该理论的基石是凸体的L_p-仿射表面积。在这里,我们介绍了这个概念的函数形式,对数凹函数和s-凹函数。我们证明了新的泛函形式是原L_p-仿射表面积的推广。证明了对数凹函数和s-凹函数的对偶关系和仿射等周不等式。这导致了一个新的逆log-Sobolev不等式的s-凹密度。

英文摘要:

In contemporary convex geometry, the rapidly developing L_p-Brunn Minkowski theory is a modern analogue of the classical Brunn Minkowski theory. A cornerstone of this theory is the L_p-affine surface area for convex bodies. Here, we introduce a functional form of this concept, for log concave and s-concave functions. We show that the new functional form is a generalization of the original L_p-affine surface area. We prove duality relations and affine isoperimetric inequalities for log concave and s-concave functions. This leads to a new inverse log-Sobolev inequality for s-concave densities.

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