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CosIntegral




Mathematica Notation

Traditional Notation









Gamma, Beta, Erf > CosIntegral[z] > Complex characteristics > Real part





http://functions.wolfram.com/06.38.19.0001.01









  


  








Input Form





Re[CosIntegral[x + I y]] == (1/2) Log[x^2 + y^2] + (1/2) Sum[(y^(2 k)/(k (2 k)!)) HypergeometricPFQ[{k}, {1/2, 1 + k}, -(x^2/4)], {k, 1, Infinity}] + CosIntegral[x] - Log[x]








Standard Form





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MathML Form







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Rule Form





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Date Added to functions.wolfram.com (modification date)





2001-10-29