Some remarks on Talagrand's convolution conjecture

Abstract

We present self-contained martingale proofs of Talagrand's convolution conjecture in the Gaussian and Boolean settings with explicit dimension-free constants. The argument is based on the analysis of the stopped density martingale and a weighted Itô isometry estimate. The Gaussian case was settled by Eldan and Lee, and Lehec; the Boolean case was proved up to a $\log \log$ factor by Chen and recently settled by Lu, Guo and Fang.

Comments are welcome. Added a remark in the gaussian case