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A generic $C^1$ map has no absolutely continuous invariant probability measure

Artur Avila·Jairo Bochi
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Abstract

Let $M$ be a smooth compact manifold (maybe with boundary, maybe disconnected) of any dimension $d \ge 1$. We consider the set of $C^1$ maps $f:M\to M$ which have no absolutely continuous (with respect to Lebesgue) invariant probability measure. We show that this is a residual (dense $G_δ) set in the $C^1$ topology. In the course of the proof, we need a generalization of the usual Rokhlin tower lemma to non-invariant measures. That result may be of independent interest.

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Artur Avila, Jairo Bochi. 2006-10-18. A generic $C^1$ map has no absolutely continuous invariant probability measure. https://doi.org/10.1088/0951-7715%2F19%2F11%2F001

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