Automorphism-invariant positive definite functions on free groups

Published 4 Jun 2019 in math.OA, math.GR, and math.GT | (1906.01518v1)

Abstract: In this article we raise some new questions about positive definite functions on free groups, and explain how these are related to more well-known questions. The article is intended as a survey of known results that also offers some new perspectives and interesting observations; therefore the style is expository.

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