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Asymptotic geometry of non-mixing sequences.

By M. Einsiedler and T. Ward

Abstract

The exact order of mixing for zero-dimensional algebraic dynamical systems is not entirely understood. Here we use valuations in function fields to exhibit an asymptotic shape in non-mixing sequences for algebraic Z^2-actions. This gives a relationship between the order of mixing and the convex hull of the defining polynomial. Using this result, we show that an algebraic dynamical system for which any shape of cardinality three is mixing is mixing of order three, and for any k greater than or equal to 1 exhibit examples that are k-fold mixing but not (k+1)-fold mixing

Publisher: Cambridge University Press
Year: 2003
DOI identifier: 10.1017/S0143385702000950
OAI identifier: oai:dro.dur.ac.uk.OAI2:10054
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