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Group Actions and Singular Martingales II, The Recognition Problem
Published online by Cambridge University Press: 20 November 2018
Abstract
We continue our investigation in [RST] of a martingale formed by picking a measurable set $A$ in a compact group $G$, taking random rotates of $A$, and considering measures of the resulting intersections, suitably normalized. Here we concentrate on the inverse problem of recognizing $A$ from a small amount of data from this martingale. This leads to problems in harmonic analysis on $G$, including an analysis of integrals of products of Gegenbauer polynomials.
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- Copyright © Canadian Mathematical Society 2004