Abstract
Combining Stein's method with heat kernel techniques, we study the function Tr(AO), where A is a fixed n×n matrix over R such that Tr(AAt)=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 22n−1, slightly improving the constant in a bound of Meckes, which was obtained by completely different methods.
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