Coth[ComplexInfinity] == Indeterminate
Cell[BoxData[RowBox[List[RowBox[List["Coth", "[", "ComplexInfinity", "]"]], "\[Equal]", "Indeterminate"]]]]
<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <mi> coth </mi> <mo> ⁡ </mo> <mo> ( </mo> <mover> <mi> ∞ </mi> <mo> ~ </mo> </mover> <mo> ) </mo> </mrow> <mo> ⩵ </mo> <mi> ¿ </mi> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <coth /> <apply> <ci> OverTilde </ci> <infinity /> </apply> </apply> <ci> ¿ </ci> </apply> </annotation-xml> </semantics> </math>
Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Coth", "[", "ComplexInfinity", "]"]], "]"]], "\[RuleDelayed]", "Indeterminate"]]]]
2001-10-29