Equivalence of equicontinuity concepts for Markov operators derived from a Schur-like property for spaces of measures

Sander C. Hille, Tomasz Szarek, Daniel T.H. Worm and Maria A. Ziemlańska

Statistics & Probability Letters, 2021, vol. 169, issue C

Abstract: Various equicontinuity properties for families of Markov operators have been – and still are – used in the study of existence and uniqueness of invariant probability for these operators, and of asymptotic stability. We prove a general result on equivalence of equicontinuity concepts. It allows comparing results in the literature and switching from one view on equicontinuity to another, which is technically convenient in proofs. More precisely, the characterisation is based on a ‘Schur-like property’ for measures: if a sequence of finite signed Borel measures on a Polish space is such that it is bounded in total variation norm and such that for each bounded Lipschitz function the sequence of integrals of this function with respect to these measures converges, then the sequence converges in dual bounded Lipschitz norm to a measure.

Keywords: Markov operators; Equicontinuity; Measure; Dual bounded Lipschitz norm; Weak topology; Schur property (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1016/j.spl.2020.108964

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