Regular part - Alchetron, The Free Social Encyclopedia

In mathematics, the regular part of a Laurent series consists of the series of terms with positive powers. That is, if

f ( z ) = ∑ n = − ∞ ∞ a n ( z − c ) n ,

then the regular part of this Laurent series is

∑ n = 0 ∞ a n ( z − c ) n .

In contrast, the series of terms with negative powers is the principal part.

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