The absolute continuity of the invariant measure of random iterated function systems with overlaps

Details The absolute continuity of the invariant measure of random iterated function systems with overlaps The absolute continuity of the invariant measure of random iterated function systems with overlaps

2009-03-12

arxiv.org/abs/0903.2166v1

Mathematics

Dynamical Systems

14 pages

Scientific paper

We consider iterated function systems on the interval with random perturbation. Let $Y_\epsilon$ be uniformly distributed in $[1- \epsilon, 1 + \epsilon]$ and let $f_i \in C^{1+\alpha}$ be contractions with fixpoints $a_i$. We consider the iterated function system $\{Y_\epsilon f_i + a_i (1 - Y_\epsilon) \}_{i=1}^n$, were each of the maps are chosen with probability $p_i$. It is shown that the invariant density is in $L^2$ and the $L^2$-norm does not grow faster than $1/\sqrt{\epsilon}$, as $\epsilon$ vanishes.

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