PermalinkSubmitted by bonatti on Sat, 06/17/2017 - 15:44

In dimension >2 the answer is "no": the product of any diffeomorphism f by an irrational rotation (or translation) as no periodic points, hence is Kupka-Smale, but has the same entropy as f (hence it can be >0).

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## See M. Herman, Construction d

See M. Herman, Construction d'un diffeomorphisme minimale d'entropie nulle, Erg. Theory and Dyn. Syst. 1 (1981) 65-76

## In dimension >2 the answer is

In dimension >2 the answer is "no": the product of any diffeomorphism f by an irrational rotation (or translation) as no periodic points, hence is Kupka-Smale, but has the same entropy as f (hence it can be >0).

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