Sign[-2 I] == -I
Cell[BoxData[RowBox[List[RowBox[List["Sign", "[", RowBox[List[RowBox[List["-", "2"]], "\[ImaginaryI]"]], "]"]], "\[Equal]", RowBox[List["-", "\[ImaginaryI]"]]]]]]
<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mo> - </mo> <mn> 2 </mn> </mrow> <mo> ⁢ </mo> <mi> ⅈ </mi> </mrow> <mo> ) </mo> </mrow> <mo> ⩵ </mo> <mrow> <mo> - </mo> <mi> ⅈ </mi> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <ci> Sign </ci> <apply> <times /> <cn type='integer'> -2 </cn> <imaginaryi /> </apply> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <imaginaryi /> </apply> </apply> </annotation-xml> </semantics> </math>
Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Sign", "[", RowBox[List[RowBox[List["-", "2"]], " ", "\[ImaginaryI]"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["-", "\[ImaginaryI]"]]]]]]
2001-10-29
){kind=small}
