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AN UNCOUNTABLE FAMILY OF GROUP AUTOMORPHISMS, AND A TYPICAL MEMBER

Published online by Cambridge University Press:  01 September 1997

THOMAS WARD
Affiliation:
School of Mathematics, University of East Anglia, Norwich NR4 7TJ
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Abstract

We describe an uncountable family of compact group automorphisms with entropy log 2. Each member of the family has a distinct dynamical zeta function, and the members are parametrised by a probability space. A positive proportion of the members have positive upper growth rate of periodic points, and almost all of them have an irrational dynamical zeta function.

If infinitely many Mersenne numbers have a bounded number of prime divisors, then a typical member of the family has upper growth rate of periodic points equal to log 2, and lower growth rate equal to zero.

Type
Research Article
Copyright
© The London Mathematical Society 1997

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