Topological entropy and complexity for discrete dynamical systems

Details Topological entropy and complexity for discrete dynamical systems Topological entropy and complexity for discrete dynamical systems

1998-06-24

arxiv.org/abs/chao-dyn/9806026v1

Nonlinear Sciences

Chaotic Dynamics

1 LaTex file = 4 pages, 2 figures = 2 PostScript files

Scientific paper

To test a possible relation between the topological entropy and the Arnold complexity, and to provide a non trivial example of a rational dynamical zeta function, we introduce a two-parameter family of two-dimensional discrete rational mappings. The generating functions of the number of fixed points, and of the degree of the successive iterates, are both considered. We conjecture rational expressions with integer coefficients for these two generating functions. and a rational expression for the dynamical zeta function. We then deduce algebraic values for the complexity growth and for the exponential of the topological entropy. Moreover, these two numbers happen to be equal for all the values of the parameters. These conjectures are supported by a semi-numerical method we explain. This method also localizes the integrable cases.

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