Fractal asymptotics

Details Fractal asymptotics Fractal asymptotics

2002-10-29

arxiv.org/abs/nlin/0210067v2

Physica D 187, 214-222 (2004)

Nonlinear Sciences

Chaotic Dynamics

15 pages, 5 postscript figures incorporated into the text; v2: Quadratic Pade (Shafer) method added, also a few references

Scientific paper

Recent advances in the periodic orbit theory of stochastically perturbed systems have permitted a calculation of the escape rate of a noisy chaotic map to order 64 in the noise strength. Comparison with the usual asymptotic expansions obtained from integrals and with a previous calculation of the electrostatic potential of exactly selfsimilar fractal charge distributions, suggests a remarkably accurate form for the late terms in the expansion, with parameters determined independently from the fractal repeller and the critical point of the map. Two methods give a precise meaning to the asymptotic expansion, Borel summation and Shafer approximants. These can then be compared with the escape rate as computed by alternative methods.

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