Remarques sur les systemes dynamiques donnes avec plusieurs facteurs
Remarques sur les systemes dynamiques donnes avec plusieurs facteurs
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DOI:
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发表时间:
1975
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影响因子:
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通讯作者:
J. Thouvenot
中科院分区:
文献类型:
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作者:
J. Thouvenot
Two Bernoulli shifts are given, (X, T) and (X′, T′), with independent generatorsR=P ∨Q andR′=P′ ∨Q′ respectively. (R andR′ are finite). One can chooseR such that if (X′, T′) can be made a factor of (X, T) in such a way that (P′)T′ and (Q′)T′ are full entropy factors of (P)T and (Q)T respectively thend (P ∨Q)=d(P′ ∨Q′). In addition it is proved that if (X, T) is a Bernoulli shift and ifS is a measure preserving transformation ofX that has the same factor algebras asT thenS=T orS=T−1. A tool for this proof, which may be of independent interest is a relative version for very weak Bernoullicity.