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Mathematics > Dynamical Systems
Title: An application of Grothendieck theorem to the theory of multicorrelation sequences, multiple recurrence and partition regularity of quadratic equations
(Submitted on 24 Feb 2023)
Abstract: We use Grothendieck theorem to prove a structure theorem for multicorrelation sequences of length two, associated with two (not necessarily commuting) measure preserving actions on a probability space. We use this to deduce a multiple recurrence result concerning products of linear terms, and a partition regularity result of certain systems of quadratic equations, building on the work of Frantzikinakis and Host.
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