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 EulerGamma

 http://functions.wolfram.com/02.06.06.0002.01

 Input Form

 EulerGamma == Log[2]/2 + (1/Log[2]) Sum[((-1)^k/k) Log[k], {k, 2, Infinity}]

 Standard Form

 Cell[BoxData[RowBox[List["EulerGamma", "\[Equal]", RowBox[List[FractionBox[RowBox[List["Log", "[", "2", "]"]], "2"], "+", RowBox[List[FractionBox["1", RowBox[List["Log", "[", "2", "]"]]], RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "2"]], "\[Infinity]"], RowBox[List[FractionBox[RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " "]], "k"], RowBox[List["Log", "[", "k", "]"]]]]]]]]]]]]]]

 MathML Form

 TagBox["\[DoubledGamma]", Function[EulerGamma]] log ( 2 ) 2 + 1 log ( 2 ) k = 2 ( - 1 ) k log ( k ) k 2 2 -1 1 2 -1 k 2 -1 k k k -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", "EulerGamma", "]"]], "\[RuleDelayed]", RowBox[List[FractionBox[RowBox[List["Log", "[", "2", "]"]], "2"], "+", FractionBox[RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "2"]], "\[Infinity]"], FractionBox[RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " ", RowBox[List["Log", "[", "k", "]"]]]], "k"]]], RowBox[List["Log", "[", "2", "]"]]]]]]]]]

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

 2001-10-29