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 ArcSech

 http://functions.wolfram.com/01.30.27.1327.01

 Input Form

 ArcSech[z] == 2 I ArcSec[Sqrt[-2 z]/Sqrt[1 - z]] - Pi I /; Im[z] > 0

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["ArcSech", "[", "z", "]"]], "\[Equal]", RowBox[List[RowBox[List["2", " ", "\[ImaginaryI]", " ", RowBox[List["ArcSec", "[", FractionBox[SqrtBox[RowBox[List[RowBox[List["-", "2"]], "z"]]], SqrtBox[RowBox[List["1", "-", "z"]]]], "]"]]]], "-", RowBox[List["\[Pi]", " ", "\[ImaginaryI]"]]]]]], "/;", RowBox[List[RowBox[List["Im", "[", "z", "]"]], ">", "0"]]]]]]

 MathML Form

 sech - 1 ( z ) 2 sec - 1 ( - 2 z 1 - z ) - π /; Im ( z ) > 0 Condition z 2 -2 z 1 2 1 -1 z 1 2 -1 -1 z 0 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["ArcSech", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List[RowBox[List["2", " ", "\[ImaginaryI]", " ", RowBox[List["ArcSec", "[", FractionBox[SqrtBox[RowBox[List[RowBox[List["-", "2"]], " ", "z"]]], SqrtBox[RowBox[List["1", "-", "z"]]]], "]"]]]], "-", RowBox[List["\[Pi]", " ", "\[ImaginaryI]"]]]], "/;", RowBox[List[RowBox[List["Im", "[", "z", "]"]], ">", "0"]]]]]]]]

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

 2003-08-21