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In mathematics, Mittag-Leffler summation is any of several variations of the Borel summation method for summing possibly divergent formal power series, introduced by ==Definition== Let : be a formal power series in ''z''. Define the transform of by : Then the Mittag-Leffler sum of ''y'' is given by : if each sum converges and the limit exists. A closely related summation method, also called Mittag-Leffler summation, is given as follows . Suppose that the Borel transform converges to an analytic function near 0 that can be analytically continued along the positive real axis to a function growing sufficiently slowly that the following integral is well defined (as an improper integral). Then the Mittag-Leffler sum of ''y'' is given by : When ''α'' = 1 this is the same as Borel summation. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Mittag-Leffler summation」の詳細全文を読む スポンサード リンク
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