We consider piecewise monotone interval mappings which are topologically mixing and satisfy the Markov property. It has previously been shown that the invariant densities of the natural approximations converge exponentially fast in uniform pointwise topology to the invariant density of the given map provided its derivative is piecewise Lipshitz continuous. We provide an example of a map which is Lipshitz continuous and for which the densities converge in the bounded variation norm at a logarithmic rate. This shows that in general one cannot expect exponential convergence in the bounded variation norm. Here we prove that if the derivative of the interval map is Hölder continuous and its variation is well approximable (γ-uniform variation for then the densities converge exponentially fast in the norm.
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June 2004
Research Article|
June 01 2004
Convergence of the natural approximations of piecewise monotone interval maps
Nicolai Haydn
Nicolai Haydn
Mathematics Department, University of Southern California, Los Angeles, California 90089-1113
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Chaos 14, 224–233 (2004)
Article history
Received:
June 05 2002
Accepted:
December 03 2003
Citation
Nicolai Haydn; Convergence of the natural approximations of piecewise monotone interval maps. Chaos 1 June 2004; 14 (2): 224–233. https://doi.org/10.1063/1.1644517
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