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1985 | OriginalPaper | Buchkapitel

Differentiation under the Integral Sign. Improper Integrals. The Gamma Function

verfasst von : Murray H. Protter, Charles B. Morrey Jr.

Erschienen in: Intermediate Calculus

Verlag: Springer New York

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We recall the elementary integration formula $$\int_0^1 {{t^n}dt = } \left[ {\frac{1}{{n + 1}}{t^{n + 1}}} \right]_0^1 = \frac{1}{{n + 1}},$$ valid for any n >-1 Since need not be an integer, we employ the variable x and write 1 $$\emptyset \left( x \right) = \int_0^1 {{t^x}dt} = \frac{1}{{x + 1}},x > - 1.$$ x>–1.

Metadaten
Titel
Differentiation under the Integral Sign. Improper Integrals. The Gamma Function
verfasst von
Murray H. Protter
Charles B. Morrey Jr.
Copyright-Jahr
1985
Verlag
Springer New York
DOI
https://doi.org/10.1007/978-1-4612-1086-3_8