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 PolyLog

 http://functions.wolfram.com/10.07.06.0007.02

 Input Form

 PolyLog[2, z] \[Proportional] Pi^2/6 + O[z - 1] - Log[1 - z] (z - 1) (1 + O[z - 1])

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["PolyLog", "[", RowBox[List["2", ",", "z"]], "]"]], "\[Proportional]", RowBox[List[FractionBox[SuperscriptBox["\[Pi]", "2"], "6"], "+", RowBox[List["O", "[", RowBox[List["z", "-", "1"]], "]"]], "-", RowBox[List[RowBox[List["Log", "[", RowBox[List["1", "-", "z"]], "]"]], RowBox[List["(", RowBox[List["z", "-", "1"]], ")"]], RowBox[List["(", RowBox[List["1", "+", RowBox[List["O", "[", RowBox[List["z", "-", "1"]], "]"]]]], ")"]]]]]]]]]]

 MathML Form

 Li PolyLog 2 ( z ) π 2 6 + O ( z - 1 ) - log ( 1 - z ) ( z - 1 ) ( 1 + O ( z - 1 ) ) Proportional PolyLog 2 z 2 6 -1 O z -1 -1 1 -1 z z -1 1 O z -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["PolyLog", "[", RowBox[List["2", ",", "z_"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox[SuperscriptBox["\[Pi]", "2"], "6"], "+", RowBox[List["O", "[", RowBox[List["z", "-", "1"]], "]"]], "-", RowBox[List[RowBox[List["Log", "[", RowBox[List["1", "-", "z"]], "]"]], " ", RowBox[List["(", RowBox[List["z", "-", "1"]], ")"]], " ", RowBox[List["(", RowBox[List["1", "+", RowBox[List["O", "[", RowBox[List["z", "-", "1"]], "]"]]]], ")"]]]]]]]]]]

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

 2001-10-29