Stein's method, heat kernel, and linear functions on the orthogonal groups

Details Stein's method, heat kernel, and linear functions on the orthogonal groups Stein's method, heat kernel, and linear functions on the orthogonal groups

2011-09-14

arxiv.org/abs/1109.2975v1

Mathematics

Probability

12 pages

Scientific paper

Combining Stein's method with heat kernel techniques, we study the function Tr(AO), where A is a fixed n by n real matrix over such that Tr(AA^t)=n, and O is from the Haar measure of the orthogonal group O(n,R). It is shown that the total variation distance of the random variable Tr(AO) to a standard normal random variable is bounded by 2 * squareroot(2) /(n-1), slightly improving the constant in a bound of Meckes, which was obtained by completely different methods.

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