Singularities[ZetaClassical[s, (Editable -> True)[a]], a] == {} /; !(Element[s, Integers] && s > 0)

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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> <mi> &#119982;&#119998;&#120003;&#8458; </mi> <mi> a </mi> </msub> <mo> ( </mo> <semantics> <mstyle scriptlevel='0'> <mrow> <mover> <mi> &#950; </mi> <mo> ^ </mo> </mover> <mo> &#8290; </mo> <mrow> <mo> ( </mo> <mrow> <mi> s </mi> <mo> , </mo> <mi> a </mi> </mrow> <mo> ) </mo> </mrow> </mrow> </mstyle> <annotation encoding='Mathematica'> TagBox[StyleBox[RowBox[List[OverscriptBox[&quot;\[Zeta]&quot;, &quot;^&quot;], RowBox[List[&quot;(&quot;, RowBox[List[TagBox[&quot;s&quot;, Rule[Editable, True]], &quot;,&quot;, TagBox[&quot;a&quot;, Rule[Editable, True]]]], &quot;)&quot;]]]], Rule[ScriptLevel, 0]], InterpretTemplate[Function[List[$CellContext`e1, $CellContext`e2], Zeta[$CellContext`e1, $CellContext`e2]]]] </annotation> </semantics> <mo> ) </mo> </mrow> <mo> &#10869; </mo> <mrow> <mo> { </mo> <mo> } </mo> </mrow> </mrow> <mo> /; </mo> <mrow> <mi> s </mi> <mo> &#8713; </mo> <msup> <mi> &#8469; </mi> <mo> + </mo> </msup> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <ci> Condition </ci> <apply> <eq /> <apply> <apply> <ci> Subscript </ci> <ci> &#119982;&#119998;&#120003;&#8458; </ci> <ci> a </ci> </apply> <apply> <ci> Zeta </ci> <ci> s </ci> <ci> a </ci> </apply> </apply> <list /> </apply> <apply> <notin /> <ci> s </ci> <apply> <ci> SuperPlus </ci> <ci> &#8469; </ci> </apply> </apply> </apply> </annotation-xml> </semantics> </math>

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2001-10-29