Local variational principle concerning entropy of a sofic group action

Details Local variational principle concerning entropy of a sofic group action Local variational principle concerning entropy of a sofic group action

2011-09-15

arxiv.org/abs/1109.3244v1

Mathematics

Dynamical Systems

Scientific paper

Recently Lewis Bowen introduced a notion of entropy for measure-preserving actions of countable sofic groups admitting a generating measurable partition with finite entropy; and then David Kerr and Hanfeng Li developed an operator-algebraic approach to actions of countable sofic groups not only on a standard probability space but also on a compact metric space, and established the global variational principle concerning measure-theoretic and topological entropy in this sofic context. By localizing these two kinds of entropy, in this paper we prove a local version of the global variational principle for any finite open cover of the space, and show that these local measure-theoretic and topological entropy coincide with their classical counterparts when the acting group is an infinite amenable group.

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