Difference between revisions of "Signum"
From specialfunctionswiki
| Line 5: | Line 5: | ||
-1 &; x < 0 | -1 &; x < 0 | ||
\end{array} \right.$$ | \end{array} \right.$$ | ||
| + | |||
| + | <div align="center"> | ||
| + | <gallery> | ||
| + | File:Signumplot.png|Graph of $\mathrm{sgn}$. | ||
| + | </gallery> | ||
| + | </div> | ||
| + | |||
| + | |||
[[Category:SpecialFunction]] | [[Category:SpecialFunction]] | ||
Revision as of 08:01, 16 June 2016
The signum function (also called the sign function) is the function $$\mathrm{sgn}(x)=\left\{ \begin{array}{ll} 1 &; x > 0 \\ 0 &; x = 0 \\ -1 &; x < 0 \end{array} \right.$$
Graph of $\mathrm{sgn}$.
