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Fungrim entry: caf706

sgn ⁣(ez)=eIm(z)i\operatorname{sgn}\!\left({e}^{z}\right) = {e}^{\operatorname{Im}(z) i}
Assumptions:zCz \in \mathbb{C}
TeX:
\operatorname{sgn}\!\left({e}^{z}\right) = {e}^{\operatorname{Im}(z) i}

z \in \mathbb{C}
Definitions:
Fungrim symbol Notation Short description
Signsgn(z)\operatorname{sgn}(z) Sign function
Expez{e}^{z} Exponential function
ImIm(z)\operatorname{Im}(z) Imaginary part
ConstIii Imaginary unit
CCC\mathbb{C} Complex numbers
Source code for this entry:
Entry(ID("caf706"),
    Formula(Equal(Sign(Exp(z)), Exp(Mul(Im(z), ConstI)))),
    Variables(z),
    Assumptions(Element(z, CC)))

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2021-03-15 19:12:00.328586 UTC