Assumptions:
TeX:
\operatorname{sgn}(z) = \frac{z}{\left|z\right|}
z \in \mathbb{C} \setminus \left\{0\right\}Definitions:
| Fungrim symbol | Notation | Short description |
|---|---|---|
| Sign | Sign function | |
| Abs | Absolute value | |
| CC | Complex numbers |
Source code for this entry:
Entry(ID("26565c"),
Formula(Equal(Sign(z), Div(z, Abs(z)))),
Variables(z),
Assumptions(Element(z, SetMinus(CC, Set(0)))))