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 Cosh

 http://functions.wolfram.com/01.20.30.0001.01

 Input Form

 Cosh[z] == 0 /; z == Pi k I + (Pi I)/2 && Element[k, Integers]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["Cosh", "[", "z", "]"]], "\[Equal]", "0"]], "/;", RowBox[List[RowBox[List["z", "\[Equal]", RowBox[List[RowBox[List["\[Pi]", " ", "k", " ", "\[ImaginaryI]"]], "+", FractionBox[RowBox[List["\[Pi]", " ", "\[ImaginaryI]"]], "2"]]]]], "\[And]", RowBox[List["k", "\[Element]", "Integers"]]]]]]]]

 MathML Form

 cosh ( z ) 0 /; z π k + π 2 k TagBox["\[DoubleStruckCapitalZ]", Function[Integers]] Condition z 0 z k 2 -1 k [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Cosh", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List["0", "/;", RowBox[List[RowBox[List["z", "\[Equal]", RowBox[List[RowBox[List["\[Pi]", " ", "k", " ", "\[ImaginaryI]"]], "+", FractionBox[RowBox[List["\[Pi]", " ", "\[ImaginaryI]"]], "2"]]]]], "&&", RowBox[List["k", "\[Element]", "Integers"]]]]]]]]]]

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

 2001-10-29