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Title: Exponential Sum Function -- from Wolfram MathWorld

Open Graph Title: Exponential Sum Function -- from Wolfram MathWorld

X Title: Exponential Sum Function -- from Wolfram MathWorld

Description: The exponential sum function e_n(x), sometimes also denoted exp_n(x), is defined by e_n(x) = sum_(k=0)^(n)(x^k)/(k!) (1) = (e^xGamma(n+1,x))/(Gamma(n+1)), (2) where Gamma(a,x) is the upper incomplete gamma function and Gamma(x) is the (complete) gamma function.

Open Graph Description: The exponential sum function e_n(x), sometimes also denoted exp_n(x), is defined by e_n(x) = sum_(k=0)^(n)(x^k)/(k!) (1) = (e^xGamma(n+1,x))/(Gamma(n+1)), (2) where Gamma(a,x) is the upper incomplete gamma function and Gamma(x) is the (complete) gamma function.

X Description: The exponential sum function e_n(x), sometimes also denoted exp_n(x), is defined by e_n(x) = sum_(k=0)^(n)(x^k)/(k!) (1) = (e^xGamma(n+1,x))/(Gamma(n+1)), (2) where Gamma(a,x) is the upper incomplete gamma function and Gamma(x) is the (complete) gamma function.

Opengraph URL: https://mathworld.wolfram.com/ExponentialSumFunction.html

X: @WolframResearch

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Domain: mathworld.wolfram.com

DC.TitleExponential Sum Function
DC.CreatorWeisstein, Eric W.
DC.DescriptionThe exponential sum function e_n(x), sometimes also denoted exp_n(x), is defined by e_n(x) = sum_(k=0)^(n)(x^k)/(k!) (1) = (e^xGamma(n+1,x))/(Gamma(n+1)), (2) where Gamma(a,x) is the upper incomplete gamma function and Gamma(x) is the (complete) gamma function.
DC.Subject40
DC.RightsCopyright 1999-2026 Wolfram Research, Inc. See https://mathworld.wolfram.com/about/terms.html for a full terms of use statement.
DC.Formattext/html
DC.Identifierhttps://mathworld.wolfram.com/ExponentialSumFunction.html
DC.Languageen
DC.PublisherWolfram Research, Inc.
DC.Relation.IsPartOfhttps://mathworld.wolfram.com/
DC.TypeText
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