Defining Incomplete Gamma Type Function with Negative Arguments and Polygamma functions ψ(n)(−m)ψ^{(n)}(-m)

preprint2014arXivOpen access

Abstract

In this paper the incomplete gamma function γ(α,x)γ(α,x) and its derivative is considered for negative values of αα and the incomplete gamma type function γ∗(α,x−)γ_*(α,x_-) is introduced. Further the polygamma functions ψ(n)(x)ψ^{(n)}(x) are defined for negative integers via the neutrix setting.

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