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EnglishWe consider a one-parameter family of expanding interval maps {Tα} α∈[0,1] (Japanese continued fractions) which include the Gauss map (α = 1) and the nearest integer and by-excess continued fraction maps (α = 1 2, α = 0). We prove that the Kolmogorov-Sinai entropy h(α) of these maps depends continuously on the parameter and that h(α) → 0 as α → 0. Numerical results suggest that this convergence is not monotone and that the entropy function has infinitely many phase transitions and a self-similar structure. Finally, we find the natural extension and the invariant densities of the maps Tα for α = 1 n .
http://hdl.handle.net/11384/5786| Titolo: | On the entropy of japanese continued fractions |
| Autori interni: | MARMI, Stefano |
| Data di pubblicazione: | 2008 |
| Rivista: | DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS |
| Abstract: | We consider a one-parameter family of expanding interval maps {Tα} α∈[0,1] (Japanese continued fractions) which include the Gauss map (α = 1) and the nearest integer and by-excess continued fraction maps (α = 1 2, α = 0). We prove that the Kolmogorov-Sinai entropy h(α) of these maps depends continuously on the parameter and that h(α) → 0 as α → 0. Numerical results suggest that this convergence is not monotone and that the entropy function has infinitely many phase transitions and a self-similar structure. Finally, we find the natural extension and the invariant densities of the maps Tα for α = 1 n . |
| Handle: | http://hdl.handle.net/11384/5786 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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