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 Power

 http://functions.wolfram.com/01.02.16.0093.01

 Input Form

 (z^n)^(1/n) == z /; Inequality[Pi/n, LessEqual, Arg[z], Less, -(Pi/n)] && Element[n, Integers] && n < 0

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", SuperscriptBox["z", "n"], ")"]], RowBox[List["1", "/", "n"]]], "\[Equal]", "z"]], "/;", RowBox[List[RowBox[List[FractionBox["\[Pi]", "n"], "\[LessEqual]", RowBox[List["Arg", "[", "z", "]"]], "<", RowBox[List["-", FractionBox["\[Pi]", "n"]]]]], "\[And]", RowBox[List["n", "\[Element]", "Integers"]], "\[And]", RowBox[List["n", "<", "0"]]]]]]]]

 MathML Form

 ( z n ) 1 / n z /; π n arg ( z ) < - π n n TagBox["\[DoubleStruckCapitalZ]", Function[Integers]] n < 0 Condition z n 1 n -1 z Inequality n -1 z -1 n -1 n n 0 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox[RowBox[List["(", SuperscriptBox["z_", "n_"], ")"]], FractionBox["1", "n_"]], "]"]], "\[RuleDelayed]", RowBox[List["z", "/;", RowBox[List[RowBox[List[FractionBox["\[Pi]", "n"], "\[LessEqual]", RowBox[List["Arg", "[", "z", "]"]], "<", RowBox[List["-", FractionBox["\[Pi]", "n"]]]]], "&&", RowBox[List["n", "\[Element]", "Integers"]], "&&", RowBox[List["n", "<", "0"]]]]]]]]]]

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

 2007-05-02