Optimization of self-similar factor approximants

Details Optimization of self-similar factor approximants Optimization of self-similar factor approximants

2009-10-26

arxiv.org/abs/0910.4851v1

Mol. Phys. 107 (2009) 2237-2244

Physics

Mathematical Physics

Latex file, 16 pages

Scientific paper

The problem is analyzed of extrapolating power series, derived for an asymptotically small variable, to the region of finite values of this variable. The consideration is based on the self-similar approximation theory. A new method is suggested for defining the odd self-similar factor approximants by employing an optimization procedure. The method is illustrated by several examples having the mathematical structure typical of the problems in statistical and chemical physics. It is shown that the suggested method provides a good accuracy even when the number of terms in the perturbative power series is small.

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