Multifractal analysis of Lyapunov exponent for the backward continued fraction map

Details Multifractal analysis of Lyapunov exponent for the backward continued fraction map Multifractal analysis of Lyapunov exponent for the backward continued fraction map

2008-12-09

arxiv.org/abs/0812.1745v1

Ergodic Theory and Dynam. Systems vol. 30 no.1 211-232 (2010)

Mathematics

Dynamical Systems

Scientific paper

In this note we study the multifractal spectrum of Lyapunov exponents for interval maps with infinitely many branches and a parabolic fixed point. It turns out that, in strong contrast with the hyperbolic case, the domain of the spectrum is unbounded and points of non-differentiability might exist. Moreover, the spectrum is not concave. We establish conditions that ensure the existence of inflection points. We also study the thermodynamic formalism for such maps. We prove that the pressure function is real analytic in a certain interval and then it becomes equal to zero.

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