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   http://functions.wolfram.com/11.08.06.0007.01
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    SpheroidalPS[\[Nu], \[Mu], \[Gamma], z] == 
  Sum[(-1)^k \[Alpha][\[Nu], \[Mu], \[Gamma], k] LegendreP[\[Nu] + 2 k, 
     \[Mu], 2, z], {k, -Infinity, Infinity}] /; 
 A[\[Nu], \[Mu], \[Gamma], k] \[Alpha][\[Nu], \[Mu], \[Gamma], k - 1] + 
   (B[\[Nu], \[Mu], \[Gamma], k] - SpheroidalEigenvalue[\[Nu], \[Mu], 
      \[Gamma]]) \[Alpha][\[Nu], \[Mu], \[Gamma], k] + 
   C[\[Nu], \[Mu], \[Gamma], k] \[Alpha][\[Nu], \[Mu], \[Gamma], k + 1] && 
  A[\[Nu], \[Mu], \[Gamma], k] == (-\[Gamma]^2) 
    (((\[Nu] - \[Mu] + 2 k - 1) (\[Nu] - \[Mu] + 2 k))/
     ((2 \[Nu] + 4 k - 3) (2 \[Nu] + 4 k - 1))) && 
  B[\[Nu], \[Mu], \[Gamma], k] == (\[Nu] + 2 k) (\[Nu] + 2 k + 1) - 
    (2 \[Gamma]^2 ((\[Nu] + 2 k) (\[Nu] + 2 k + 1) + \[Mu]^2 - 1))/
     ((2 \[Nu] + 4 k - 1) (2 \[Nu] + 4 k + 3)) && 
  C[\[Nu], \[Mu], \[Gamma], k] == 
   -((\[Gamma]^2 (\[Nu] + \[Mu] + 2 k + 1) (\[Nu] + \[Mu] + 2 k + 2))/
     ((2 \[Nu] + 4 k + 3) (2 \[Nu] + 4 k + 5))) 
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   Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["SpheroidalPS", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "z"]], "]"]], "\[Equal]", RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", RowBox[List["-", "\[Infinity]"]]]], "\[Infinity]"], RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " ", RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], " ", RowBox[List["LegendreP", "[", RowBox[List[RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ",", "\[Mu]", ",", "2", ",", "z"]], "]"]]]]]]]], "/;", RowBox[List[RowBox[List[RowBox[List[RowBox[List["A", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", RowBox[List["k", "-", "1"]]]], "]"]]]], "+", RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["B", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "-", RowBox[List["SpheroidalEigenvalue", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]"]], "]"]]]], ")"]], RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]]]], "+", RowBox[List[RowBox[List["C", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", RowBox[List["k", "+", "1"]]]], "]"]]]]]], "\[And]", RowBox[List[RowBox[List["A", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List[RowBox[List["-", SuperscriptBox["\[Gamma]", "2"]]], FormBox[FractionBox[RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "-", "\[Mu]", "+", RowBox[List["2", "k"]], "-", "1"]], ")"]], RowBox[List["(", RowBox[List["\[Nu]", "-", "\[Mu]", "+", RowBox[List["2", "k"]]]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", "k"]], "-", "3"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", "k"]], "-", "1"]], ")"]]]]], TraditionalForm]]]]], "\[And]", RowBox[List[RowBox[List["B", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]]]], "-", FractionBox[RowBox[List["2", " ", SuperscriptBox["\[Gamma]", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]]]], "+", SuperscriptBox["\[Mu]", "2"], "-", "1"]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "-", "1"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "3"]], ")"]]]]]]]]], "\[And]", RowBox[List[RowBox[List["C", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List["-", FractionBox[RowBox[List[SuperscriptBox["\[Gamma]", "2"], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", "\[Mu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", "\[Mu]", "+", RowBox[List["2", " ", "k"]], "+", "2"]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "3"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "5"]], ")"]]]]]]]]]]]]]]] 
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   <math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'>  <semantics>  <mrow>  <mrow>  <mrow>  <msub>  <semantics>  <mi> M </mi>  <annotation encoding='Mathematica'> TagBox["M", WhittakerM] </annotation>  </semantics>  <mrow>  <mi> ν </mi>  <mo> , </mo>  <mi> μ </mi>  </mrow>  </msub>  <mo> ( </mo>  <mn> 0 </mn>  <mo> ) </mo>  </mrow>  <mo>  </mo>  <mn> 0 </mn>  </mrow>  <mo> /; </mo>  <mrow>  <mrow>  <mi> Re </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> μ </mi>  <mo> ) </mo>  </mrow>  <mo> > </mo>  <mrow>  <mo> - </mo>  <mfrac>  <mn> 1 </mn>  <mn> 2 </mn>  </mfrac>  </mrow>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <ci> Condition </ci>  <apply>  <eq />  <apply>  <ci> WhittakerM </ci>  <ci> ν </ci>  <ci> μ </ci>  <cn type='integer'> 0 </cn>  </apply>  <cn type='integer'> 0 </cn>  </apply>  <apply>  <gt />  <apply>  <real />  <ci> μ </ci>  </apply>  <apply>  <times />  <cn type='integer'> -1 </cn>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["SpheroidalPS", "[", RowBox[List["\[Nu]_", ",", "\[Mu]_", ",", "\[Gamma]_", ",", "z_"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", RowBox[List["-", "\[Infinity]"]]]], "\[Infinity]"], RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], "k"], " ", RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], " ", RowBox[List["LegendreP", "[", RowBox[List[RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ",", "\[Mu]", ",", "2", ",", "z"]], "]"]]]]]], "/;", RowBox[List[RowBox[List[RowBox[List[RowBox[List["A", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], " ", RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", RowBox[List["k", "-", "1"]]]], "]"]]]], "+", RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["B", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "-", RowBox[List["SpheroidalEigenvalue", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]"]], "]"]]]], ")"]], " ", RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]]]], "+", RowBox[List[RowBox[List["C", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], " ", RowBox[List["\[Alpha]", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", RowBox[List["k", "+", "1"]]]], "]"]]]]]], "&&", RowBox[List[RowBox[List["A", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List["-", FractionBox[RowBox[List[SuperscriptBox["\[Gamma]", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "-", "\[Mu]", "+", RowBox[List["2", " ", "k"]], "-", "1"]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "-", "\[Mu]", "+", RowBox[List["2", " ", "k"]]]], ")"]]]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "-", "3"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "-", "1"]], ")"]]]]]]]]], "&&", RowBox[List[RowBox[List["B", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]]]], "-", FractionBox[RowBox[List["2", " ", SuperscriptBox["\[Gamma]", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]]]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]]]], "+", SuperscriptBox["\[Mu]", "2"], "-", "1"]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "-", "1"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "3"]], ")"]]]]]]]]], "&&", RowBox[List[RowBox[List["C", "[", RowBox[List["\[Nu]", ",", "\[Mu]", ",", "\[Gamma]", ",", "k"]], "]"]], "\[Equal]", RowBox[List["-", FractionBox[RowBox[List[SuperscriptBox["\[Gamma]", "2"], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", "\[Mu]", "+", RowBox[List["2", " ", "k"]], "+", "1"]], ")"]], " ", RowBox[List["(", RowBox[List["\[Nu]", "+", "\[Mu]", "+", RowBox[List["2", " ", "k"]], "+", "2"]], ")"]]]], RowBox[List[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "3"]], ")"]], " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "\[Nu]"]], "+", RowBox[List["4", " ", "k"]], "+", "5"]], ")"]]]]]]]]]]]]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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