On the existence of invariant probability measures |
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Authors: | Wolfgang Adamski |
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Affiliation: | 1. Mathematisches Institut der Universit?t München, Theresienstr. 39, D-8000, München 2, FRG
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Abstract: | Let (X,A) be a measureable space andT:X →X a measurable mapping. Consider a family ℳ of probability measures onA which satisfies certain closure conditions. IfA 0⊂A is a convergence class for ℳ such that, for everyA ∈A 0, the sequence ((1/n) Σ i =0/n−1 1 A ∘T i) converges in distribution (with respect to some probability measurev ∈ ℳ), then there exists aT-invariant element in ℳ. In particular, for the special case of a topological spaceX and a continuous mappingT, sufficient conditions for the existence ofT-invariant Borel probability measures with additional regularity properties are obtained. |
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