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   http://functions.wolfram.com/03.06.20.0002.01
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    D[AiryBi[z], {z, 2}] == z AiryBi[z] 
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   Cell[BoxData[RowBox[List[RowBox[List[SubscriptBox["\[PartialD]", RowBox[List["{", RowBox[List["z", ",", "2"]], "}"]]], RowBox[List["AiryBi", "[", "z", "]"]]]], "\[Equal]", RowBox[List["z", " ", RowBox[List["AiryBi", "[", "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>  <msub>  <mo> ∂ </mo>  <mrow>  <mo> { </mo>  <mrow>  <mi> z </mi>  <mo> , </mo>  <mn> 2 </mn>  </mrow>  <mo> } </mo>  </mrow>  </msub>  <mrow>  <mi> AiryBi </mi>  <mo> [ </mo>  <mi> z </mi>  <mo> ] </mo>  </mrow>  </mrow>  <mo> ⩵ </mo>  <mrow>  <mi> z </mi>  <mo> ⁢ </mo>  <mrow>  <mi> AiryBi </mi>  <mo> [ </mo>  <mi> z </mi>  <mo> ] </mo>  </mrow>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <partialdiff />  <bvar>  <ci> z </ci>  <degree>  <cn type='integer'> 2 </cn>  </degree>  </bvar>  <apply>  <ci> AiryBi </ci>  <ci> z </ci>  </apply>  </apply>  <apply>  <times />  <ci> z </ci>  <apply>  <ci> AiryBi </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[SubscriptBox["\[PartialD]", RowBox[List[RowBox[List["{", RowBox[List["z_", ",", "2"]], "}"]]]]], RowBox[List["AiryBi", "[", "z_", "]"]]]], "]"]], "\[RuleDelayed]", RowBox[List["z", " ", RowBox[List["AiryBi", "[", "z", "]"]]]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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