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 HeavisideTheta

 http://functions.wolfram.com/14.05.26.0002.01

 Input Form

 HeavisideTheta[x] == MeijerG[{{1}, {}}, {{}, {0}}, 1 + x] /; x > -2

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["HeavisideTheta", "[", "x", "]"]], "\[Equal]", RowBox[List["MeijerG", "[", RowBox[List[RowBox[List["{", RowBox[List[RowBox[List["{", "1", "}"]], ",", RowBox[List["{", "}"]]]], "}"]], ",", RowBox[List["{", RowBox[List[RowBox[List["{", "}"]], ",", RowBox[List["{", "0", "}"]]]], "}"]], ",", RowBox[List["1", "+", "x"]]]], "]"]]]], "/;", RowBox[List["x", ">", RowBox[List["-", "2"]]]]]]]]

 MathML Form

 θ HeavisideTheta ( x ) G 1 , 1 0 , 1 ( x + 1 1 0 ) TagBox[RowBox[List[SubsuperscriptBox[TagBox["G", MeijerG], RowBox[List["1", ",", "1"]], RowBox[List["0", ",", "1"]]], "\[InvisibleApplication]", RowBox[List["(", RowBox[List[TagBox[RowBox[List["x", "+", "1"]], MeijerG, Rule[Editable, True], Rule[Selectable, True]], "\[VerticalSeparator]", GridBox[List[List[TagBox["1", MeijerG, Rule[Editable, True], Rule[Selectable, True]]], List[TagBox["0", MeijerG, Rule[Editable, True], Rule[Selectable, True]]]]]]], ")"]]]], MeijerG, Rule[Editable, False], Rule[Selectable, False]] /; x > - 2 Condition HeavisideTheta x MeijerG 1 0 x 1 x -2 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["HeavisideTheta", "[", "x_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["MeijerG", "[", RowBox[List[RowBox[List["{", RowBox[List[RowBox[List["{", "1", "}"]], ",", RowBox[List["{", "}"]]]], "}"]], ",", RowBox[List["{", RowBox[List[RowBox[List["{", "}"]], ",", RowBox[List["{", "0", "}"]]]], "}"]], ",", RowBox[List["1", "+", "x"]]]], "]"]], "/;", RowBox[List["x", ">", RowBox[List["-", "2"]]]]]]]]]]

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

 2007-05-02