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asymptotic expansion
(redirected from Poincare expansion)

   Also found in: Wikipedia 0.01 sec.
asymptotic expansion [ā‚sim′täd·ik ik′span·shən]
(mathematics)
A series of the forma0+ (a1/x) + (a2/x2) + · · · + (an/xn) + · · · is an asymptotic expansion of the functionf(x) if there exists a numberNsuch that for allnNthe quantityxn[f(x) -Sn(x)] approaches zero asxapproaches infinity, whereSn(x) is the sum of the firstnterms in the series. Also known as asymptotic series.


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