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Distortion inequality for the Frobenius-Perron operator and some of its consequences in ergodic theory of Markov maps in d

Piotr Bugiel — 1998

Annales Polonici Mathematici

Asymptotic properties of the sequences (a) P φ j g j = 1 and (b) j - 1 i = 0 j - 1 P φ g j = 1 , where P φ : L ¹ L ¹ is the Frobenius-Perron operator associated with a nonsingular Markov map defined on a σ-finite measure space, are studied for g ∈ G = f ∈ L¹: f ≥ 0 and ⃦f ⃦ = 1. An operator-theoretic analogue of Rényi’s Condition is introduced. It is proved that under some additional assumptions this condition implies the L¹-convergence of the sequences (a) and (b) to a unique g₀ ∈ G. The general result is applied to some smooth Markov maps in d ....

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