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Minimal generators for ergodic endomorphisms. (English) Zbl 0676.28009
Let f be an ergodic endomorphism on a Lebesgue space with finite generator. The author gives a sharp lower bound for the number of sets of a finite generator.
Reviewer: M.Denker

##### MSC:
 28D05 Measure-preserving transformations 28D20 Entropy and other invariants
##### Keywords:
generators for endomorphisms; ergodic endomorphism
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