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 KroneckerDelta

 http://functions.wolfram.com/04.20.16.0001.01

 Input Form

 KroneckerDelta[-Subscript[n, 1], -Subscript[n, 2], \[Ellipsis], -Subscript[n, m]] == KroneckerDelta[Subscript[n, 1], Subscript[n, 2], \[Ellipsis], Subscript[n, m]]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["KroneckerDelta", "[", RowBox[List[RowBox[List["-", SubscriptBox["n", "1"]]], ",", RowBox[List["-", SubscriptBox["n", "2"]]], ",", "\[Ellipsis]", ",", RowBox[List["-", SubscriptBox["n", "m"]]]]], "]"]], "\[Equal]", RowBox[List["KroneckerDelta", "[", RowBox[List[SubscriptBox["n", "1"], ",", SubscriptBox["n", "2"], ",", "\[Ellipsis]", ",", SubscriptBox["n", "m"]]], "]"]]]]]]

 MathML Form

 δ KroneckerDelta - n 1 , - n 2 , , - n m δ KroneckerDelta n 1 , n 2 , , n m KroneckerDelta -1 Subscript n 1 -1 Subscript n 2 -1 Subscript n m KroneckerDelta Subscript n 1 Subscript n 2 Subscript n m [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["KroneckerDelta", "[", RowBox[List[RowBox[List["-", SubscriptBox["n_", "1"]]], ",", RowBox[List["-", SubscriptBox["n_", "2"]]], ",", "\[Ellipsis]_", ",", RowBox[List["-", SubscriptBox["n_", "m_"]]]]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["KroneckerDelta", "[", RowBox[List[SubscriptBox["nn", "1"], ",", SubscriptBox["nn", "2"], ",", "\[Ellipsis]", ",", SubscriptBox["nn", "m"]]], "]"]]]]]]

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

 2007-05-02