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A Remark on Measures of Sections of \(\boldsymbol{L}_{p}\)-balls

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Book cover Geometric Aspects of Functional Analysis

Part of the book series: Lecture Notes in Mathematics ((LNM,volume 2169))

Abstract

We prove that there exists an absolute constant C so that

$$\displaystyle{ \mu (K)\ \leq \ C\sqrt{p}\max _{\xi \in S^{n-1}}\mu (K \cap \xi ^{\perp })\ \vert K\vert ^{1/n} }$$

for any p > 2, any \(n \in \mathbb{N},\) any convex body K that is the unit ball of an n-dimensional subspace of L p , and any measure μ with non-negative even continuous density in \(\mathbb{R}^{n}.\) Here ξ  ⊥  is the central hyperplane perpendicular to a unit vector ξ ∈ S n−1, and | K | stands for volume.

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Acknowledgements

The first named author was partially supported by the US National Science Foundation, grant DMS-1265155.

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Koldobsky, A., Pajor, A. (2017). A Remark on Measures of Sections of \(\boldsymbol{L}_{p}\)-balls. In: Klartag, B., Milman, E. (eds) Geometric Aspects of Functional Analysis. Lecture Notes in Mathematics, vol 2169. Springer, Cham. https://doi.org/10.1007/978-3-319-45282-1_14

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