E^(-z) == 1/E^z
Cell[BoxData[RowBox[List[SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]], "\[Equal]", FractionBox["1", SuperscriptBox["\[ExponentialE]", "z"]]]]]]
<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <msup> <mi> ⅇ </mi> <mrow> <mo> - </mo> <mi> z </mi> </mrow> </msup> <mo> ⩵ </mo> <mfrac> <mn> 1 </mn> <msup> <mi> ⅇ </mi> <mi> z </mi> </msup> </mfrac> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <power /> <exponentiale /> <apply> <times /> <cn type='integer'> -1 </cn> <ci> z </ci> </apply> </apply> <apply> <times /> <cn type='integer'> 1 </cn> <apply> <power /> <apply> <power /> <exponentiale /> <ci> z </ci> </apply> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>
Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z_"]]], "]"]], "\[RuleDelayed]", FractionBox["1", SuperscriptBox["\[ExponentialE]", "z"]]]]]]
2007-05-02