On some dynamical properties of S-unimodal maps on an interval
Some dynamical properties of S-unimodal maps
We study 1) the slopes of central branches of iterates of S-unimodal maps, comparing them to the derivatives on the critical trajectory, 2) the hyperbolic structure of Collet-Eckmann maps estimating the exponents, and under a summability condition 3) the images of the density one under the iterates of the Perron-Frobenius operator, 4) the density of the absolutely continuous invariant measure.
Topological invariance of the Collet–Eckmann property for S-unimodal maps
We prove that if f, g are smooth unimodal maps of the interval with negative Schwarzian derivative, conjugated by a homeomorphism of the interval, and f is Collet-Eckmann, then so is g.
The stability study of a plane engine
We study the dynamical properties of a plane engine vibrations modelled by a system of ODE.
Invariant measures exist under a summability condition for unimodal maps.
Non-hyperbolicity and invariant measures for unimodal maps
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