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 CoshIntegral

 http://functions.wolfram.com/06.40.26.0006.01

 Input Form

 CoshIntegral[z] == (-(1/2)) (Gamma[0, -z] + Gamma[0, z] + Log[-z] - Log[z])

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["CoshIntegral", "[", "z", "]"]], "\[Equal]", RowBox[List[RowBox[List["-", FractionBox["1", "2"]]], RowBox[List["(", RowBox[List[RowBox[List["Gamma", "[", RowBox[List["0", ",", RowBox[List["-", " ", "z"]]]], "]"]], "+", RowBox[List["Gamma", "[", RowBox[List["0", ",", "z"]], "]"]], "+", RowBox[List["Log", "[", RowBox[List["-", "z"]], "]"]], "-", RowBox[List["Log", "[", "z", "]"]]]], ")"]]]]]]]]

 MathML Form

 Chi ( z ) - 1 2 ( Γ ( 0 , - z ) + Γ ( 0 , z ) + log ( - z ) - log ( z ) ) CoshIntegral z -1 1 2 Gamma 0 -1 z Gamma 0 z -1 z -1 z [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["CoshIntegral", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["-", FractionBox["1", "2"]]], " ", RowBox[List["(", RowBox[List[RowBox[List["Gamma", "[", RowBox[List["0", ",", RowBox[List["-", "z"]]]], "]"]], "+", RowBox[List["Gamma", "[", RowBox[List["0", ",", "z"]], "]"]], "+", RowBox[List["Log", "[", RowBox[List["-", "z"]], "]"]], "-", RowBox[List["Log", "[", "z", "]"]]]], ")"]]]]]]]]

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

 2001-10-29