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CatalanNumber




Mathematica Notation

Traditional Notation









Gamma, Beta, Erf > CatalanNumber[n] > Transformations > Products, sums, and powers of the direct function > Products of the direct function





http://functions.wolfram.com/06.41.16.0006.01









  


  








Input Form





CatalanNumber[z] CatalanNumber[-z] == Tan[Pi z]/(Pi z (1 - z^2))








Standard Form





Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["CatalanNumber", "[", "z", "]"]], RowBox[List["CatalanNumber", "[", RowBox[List["-", "z"]], "]"]]]], "\[Equal]", FractionBox[RowBox[List["Tan", "[", RowBox[List["\[Pi]", " ", "z"]], "]"]], RowBox[List["\[Pi]", " ", "z", RowBox[List["(", RowBox[List["1", "-", SuperscriptBox["z", "2"]]], ")"]]]]]]]]]








MathML Form







<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <msub> <semantics> <mi> C </mi> <annotation encoding='Mathematica'> TagBox[&quot;C&quot;, CatalanNumber] </annotation> </semantics> <mi> z </mi> </msub> <mo> &#8290; </mo> <msub> <semantics> <mi> C </mi> <annotation encoding='Mathematica'> TagBox[&quot;C&quot;, CatalanNumber] </annotation> </semantics> <mrow> <mo> - </mo> <mi> z </mi> </mrow> </msub> </mrow> <mo> &#63449; </mo> <mfrac> <mrow> <mi> tan </mi> <mo> &#8289; </mo> <mo> ( </mo> <mrow> <mi> &#960; </mi> <mo> &#8290; </mo> <mi> z </mi> </mrow> <mo> ) </mo> </mrow> <mrow> <mi> &#960; </mi> <mo> &#8290; </mo> <mi> z </mi> <mo> &#8290; </mo> <mrow> <mo> ( </mo> <mrow> <mn> 1 </mn> <mo> - </mo> <msup> <mi> z </mi> <mn> 2 </mn> </msup> </mrow> <mo> ) </mo> </mrow> </mrow> </mfrac> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <times /> <apply> <ci> CatalanNumber </ci> <ci> z </ci> </apply> <apply> <ci> CatalanNumber </ci> <apply> <times /> <cn type='integer'> -1 </cn> <ci> z </ci> </apply> </apply> </apply> <apply> <times /> <apply> <tan /> <apply> <times /> <pi /> <ci> z </ci> </apply> </apply> <apply> <power /> <apply> <times /> <pi /> <ci> z </ci> <apply> <plus /> <cn type='integer'> 1 </cn> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <power /> <ci> z </ci> <cn type='integer'> 2 </cn> </apply> </apply> </apply> </apply> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>










Rule Form





Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[RowBox[List["CatalanNumber", "[", "z_", "]"]], " ", RowBox[List["CatalanNumber", "[", RowBox[List["-", "z_"]], "]"]]]], "]"]], "\[RuleDelayed]", FractionBox[RowBox[List["Tan", "[", RowBox[List["\[Pi]", " ", "z"]], "]"]], RowBox[List["\[Pi]", " ", "z", " ", RowBox[List["(", RowBox[List["1", "-", SuperscriptBox["z", "2"]]], ")"]]]]]]]]]


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





2007-05-02