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arXiv 1105.1124math.FA
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凸体的Rényi发散和$L_p$ -仿射表面积

Rényi Divergence and $L_p$-affine surface area for convex bodies

Elisabeth M. Werner

摘要:

我们证明了$L_p$ -Brunn-Minkowski理论的基本对象,即凸体的$L_p$ -仿射表面积,与信息论密切相关:它们是凸体的锥测度及其极函数的Rényi发散的指数.我们给几何解释的所有雷尼分歧$D_α$,而不仅仅是以前处理的特殊情况下的相对熵的情况$α=1$。现在,不需要对称性假设,如果需要的话,只需要非常弱的正则性假设。以前,相对熵仅在对某些表达式进行二阶展开后才出现。现在一阶展开已经使它们出现了。因此,在新的方法中,我们检测“更快”的细节边界的凸体。

英文摘要:

We show that the fundamental objects of the $L_p$-Brunn-Minkowski theory, namely the $L_p$-affine surface areas for a convex body, are closely related to information theory: they are exponentials of Rényi divergences of the cone measures of a convex body and its polar. We give geometric interpretations for all Rényi divergences $D_α$, not just for the previously treated special case of relative entropy which is the case $α=1$. Now, no symmetry assumptions are needed and, if at all, only very weak regularity assumptions are required. Previously, the relative entropies appeared only after performing second order expansions of certain expressions. Now already first order expansions makes them appear. Thus, in the new approach we detect "faster" details about the boundary of a convex body.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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