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 Sqrt

 http://functions.wolfram.com/01.01.16.0063.01

 Input Form

 Sqrt[-(I/z)] == -((-1)^(3/4 + Floor[3/4 + Arg[z]/(2 Pi)])/Sqrt[z])

 Standard Form

 Cell[BoxData[RowBox[List[SqrtBox[RowBox[List["-", FractionBox["\[ImaginaryI]", "z"]]]], "\[Equal]", RowBox[List["-", FractionBox[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], RowBox[List[FractionBox["3", "4"], "+", RowBox[List["Floor", "[", RowBox[List[FractionBox["3", "4"], "+", FractionBox[RowBox[List["Arg", "[", "z", "]"]], RowBox[List["2", " ", "\[Pi]"]]]]], "]"]]]]], SqrtBox["z"]]]]]]]]

 MathML Form

 - z - ( - 1 ) arg ( z ) 2 π + 3 4 + 3 4 z -1 z -1 1 2 -1 -1 z 2 -1 3 4 3 4 z 1 2 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SqrtBox[RowBox[List["-", FractionBox["\[ImaginaryI]", "z_"]]]], "]"]], "\[RuleDelayed]", RowBox[List["-", FractionBox[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], RowBox[List[FractionBox["3", "4"], "+", RowBox[List["Floor", "[", RowBox[List[FractionBox["3", "4"], "+", FractionBox[RowBox[List["Arg", "[", "z", "]"]], RowBox[List["2", " ", "\[Pi]"]]]]], "]"]]]]], SqrtBox["z"]]]]]]]]

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

 2007-05-02