html, body, form { margin: 0; padding: 0; width: 100%; } #calculate { position: relative; width: 177px; height: 110px; background: transparent url(/images/alphabox/embed_functions_inside.gif) no-repeat scroll 0 0; } #i { position: relative; left: 18px; top: 44px; width: 133px; border: 0 none; outline: 0; font-size: 11px; } #eq { width: 9px; height: 10px; background: transparent; position: absolute; top: 47px; right: 18px; cursor: pointer; }

 Exp

 http://functions.wolfram.com/01.03.06.0015.01

 Input Form

 E^(-z) == BesselI[0, z] + 2 Sum[(-1)^k BesselI[k, z], {k, 1, Infinity}]

 Standard Form

 Cell[BoxData[RowBox[List[SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]], "\[Equal]", RowBox[List[RowBox[List["BesselI", "[", RowBox[List["0", ",", "z"]], "]"]], "+", RowBox[List["2", " ", RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "1"]], "\[Infinity]"], RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " ", RowBox[List["BesselI", "[", RowBox[List["k", ",", "z"]], "]"]]]]]]]]]]]]]]

 MathML Form

 - z I 0 ( z ) + 2 k = 1 ( - 1 ) k I k ( z ) -1 z BesselI 0 z 2 k 1 -1 k BesselI k z [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z_"]]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["BesselI", "[", RowBox[List["0", ",", "z"]], "]"]], "+", RowBox[List["2", " ", RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "1"]], "\[Infinity]"], RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " ", RowBox[List["BesselI", "[", RowBox[List["k", ",", "z"]], "]"]]]]]]]]]]]]]]

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

 2001-10-29