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 EulerGamma

 http://functions.wolfram.com/02.06.07.0004.01

 Input Form

 EulerGamma == -Log[4] - (4/Sqrt[Pi]) Integrate[Log[t]/E^t^2, {t, 0, Infinity}]

 Standard Form

 Cell[BoxData[RowBox[List["EulerGamma", "\[Equal]", RowBox[List[RowBox[List["-", RowBox[List["Log", "[", "4", "]"]]]], "-", RowBox[List[FractionBox["4", SqrtBox["\[Pi]"]], RowBox[List[SubsuperscriptBox["\[Integral]", "0", "\[Infinity]"], RowBox[List[SuperscriptBox["\[ExponentialE]", RowBox[List["-", SuperscriptBox["t", "2"]]]], RowBox[List["Log", "[", "t", "]"]], RowBox[List["\[DifferentialD]", "t"]]]]]]]]]]]]]]

 MathML Form

 TagBox["\[DoubledGamma]", Function[EulerGamma]] - 4 π 0 - t 2 log ( t ) t - log ( 4 ) -1 4 1 2 -1 t 0 -1 t 2 t -1 4 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", "EulerGamma", "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["-", RowBox[List["Log", "[", "4", "]"]]]], "-", FractionBox[RowBox[List["4", " ", RowBox[List[SubsuperscriptBox["\[Integral]", "0", "\[Infinity]"], RowBox[List[RowBox[List[SuperscriptBox["\[ExponentialE]", RowBox[List["-", SuperscriptBox["t", "2"]]]], " ", RowBox[List["Log", "[", "t", "]"]]]], RowBox[List["\[DifferentialD]", "t"]]]]]]]], SqrtBox["\[Pi]"]]]]]]]]

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

 2001-10-29