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   http://functions.wolfram.com/09.50.04.0001.01
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    DomainAndRange[Function[z, KleinInvariantJ[z]]] == 
 Complexes \[LongRightArrow] Complexes 
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   Cell[BoxData[RowBox[List[RowBox[List["DomainAndRange", "[", RowBox[List["Function", "[", RowBox[List["z", ",", RowBox[List["KleinInvariantJ", "[", "z", "]"]]]], "]"]], "]"]], " ", "\[Equal]", RowBox[List["Complexes", "\[LongRightArrow]", "Complexes"]]]]]] 
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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> z </mi>  <mo> ⟶ </mo>  <mrow>  <mi> J </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <semantics>  <mi> z </mi>  <annotation encoding='Mathematica'> TagBox["z", Rule[Editable, True]] </annotation>  </semantics>  <mo> ) </mo>  </mrow>  </mrow>  <mo> ∷ </mo>  <mrow>  <mi> ℂ </mi>  <mo> ⟶ </mo>  <mi> ℂ </mi>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <ci> Proportion </ci>  <apply>  <ci> LongRightArrow </ci>  <ci> z </ci>  <apply>  <ci> J </ci>  <apply>  <apply>  <ci> Rule </ci>  <ci> Editable </ci>  <true />  </apply>  <ci> z </ci>  </apply>  </apply>  </apply>  <apply>  <ci> LongRightArrow </ci>  <ci> ℂ </ci>  <ci> ℂ </ci>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["DomainAndRange", "[", RowBox[List["Function", "[", RowBox[List["z_", ",", RowBox[List["KleinInvariantJ", "[", "z_", "]"]]]], "]"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["Complexes", "\[LongRightArrow]", "Complexes"]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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