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A variation on the variational principle and applications to entropy pairs

Published online by Cambridge University Press:  17 April 2001

F. BLANCHARD
Affiliation:
LMD-CNRS, case 930, 163 avenue de Luminy, 13288 Marseille Cedex 09, France
E. GLASNER
Affiliation:
School of Mathematics, Tel Aviv University, Tel Aviv 69978, Israel
B. HOST
Affiliation:
LMD-CNRS, case 930, 163 avenue de Luminy, 13288 Marseille Cedex 09, France

Abstract

The variational principle states that the topological entropy of a topological dynamical system is equal to the sup of the entropies of invariant measures. It is proved that for any finite open cover there is an invariant measure such that the topological entropy of this cover is less than or equal to the entropies of all finer partitions. One consequence of this result is that for any dynamical system with positive topological entropy there exists an invariant measure whose set of entropy pairs is equal to the set of topological entropy pairs.

Type
Research Article
Copyright
1997 Cambridge University Press

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