Pi == Gamma[1/2]^2
Cell[BoxData[RowBox[List["\[Pi]", "\[Equal]", SuperscriptBox[RowBox[List["Gamma", "[", FractionBox["1", "2"], "]"]], "2"]]]]]
<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mi> π </mi> <mo> ⩵ </mo> <msup> <mrow> <mi> Γ </mi> <mo> ⁡ </mo> <mo> ( </mo> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> <mo> ) </mo> </mrow> <mn> 2 </mn> </msup> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <pi /> <apply> <power /> <apply> <ci> Gamma </ci> <cn type='rational'> 1 <sep /> 2 </cn> </apply> <cn type='integer'> 2 </cn> </apply> </apply> </annotation-xml> </semantics> </math>
Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", "\[Pi]", "]"]], "\[RuleDelayed]", SuperscriptBox[RowBox[List["Gamma", "[", FractionBox["1", "2"], "]"]], "2"]]]]]
2001-10-29