Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-02-28
Physica A 328, 409-438 (2003)
Physics
Condensed Matter
Statistical Mechanics
30 pages + 5 ps figures, some misprints have been corrected
Scientific paper
10.1016/S0378-4371(03)00549-1
A novel method of summation for power series is developed. The method is based on the self-similar approximation theory. The trick employed is in transforming, first, a series expansion into a product expansion and in applying the self-similar renormalization to the latter rather to the former. This results in self-similar factor approximants extrapolating the sought functions from the region of asymptotically small variables to their whole domains. The method of constructing crossover formulas, interpolating between small and large values of variables is also analysed. The techniques are illustrated on different series which are typical of problems in statistical mechanics, condensed-matter physics, and, generally, in many-body theory.
Gluzman Simon
Sornette Didier
Yukalov V. I.
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