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   http://functions.wolfram.com/01.23.26.0027.01
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    Csch[z] == Sqrt[2/Pi]/(Sqrt[z] StruveL[-(1/2), z]) 
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   Cell[BoxData[RowBox[List[RowBox[List["Csch", "[", "z", "]"]], "\[Equal]", FractionBox[SqrtBox[FractionBox["2", "\[Pi]"]], RowBox[List[" ", RowBox[List[SqrtBox["z"], " ", RowBox[List["StruveL", "[", RowBox[List[RowBox[List["-", FractionBox["1", "2"]]], ",", "z"]], "]"]]]]]]]]]]] 
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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>  <mi> csch </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> z </mi>  <mo> ) </mo>  </mrow>  <mo> ⩵ </mo>  <mrow>  <msqrt>  <mfrac>  <mn> 2 </mn>  <mi> π </mi>  </mfrac>  </msqrt>  <mo> ⁢ </mo>  <mfrac>  <mn> 1 </mn>  <mrow>  <msqrt>  <mi> z </mi>  </msqrt>  <mo> ⁢ </mo>  <mrow>  <msub>  <mstyle fontweight='bold' fontstyle='normal'>  <semantics>  <mi> L </mi>  <annotation-xml encoding='MathML-Content'>  <ci> StruveL </ci>  </annotation-xml>  </semantics>  </mstyle>  <mrow>  <mo> - </mo>  <mfrac>  <mn> 1 </mn>  <mn> 2 </mn>  </mfrac>  </mrow>  </msub>  <mo> ( </mo>  <mi> z </mi>  <mo> ) </mo>  </mrow>  </mrow>  </mfrac>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <csch />  <ci> z </ci>  </apply>  <apply>  <times />  <apply>  <power />  <apply>  <times />  <cn type='integer'> 2 </cn>  <apply>  <power />  <pi />  <cn type='integer'> -1 </cn>  </apply>  </apply>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <times />  <cn type='integer'> 1 </cn>  <apply>  <power />  <apply>  <times />  <apply>  <power />  <ci> z </ci>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <ci> StruveL </ci>  <apply>  <times />  <cn type='integer'> -1 </cn>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> z </ci>  </apply>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Csch", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", FractionBox[SqrtBox[FractionBox["2", "\[Pi]"]], RowBox[List[SqrtBox["z"], " ", RowBox[List["StruveL", "[", RowBox[List[RowBox[List["-", FractionBox["1", "2"]]], ",", "z"]], "]"]]]]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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