Difference between revisions of "Signum"
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[https://www.youtube.com/watch?v=b1xy4fVuY3U What is Signum Function in Mathematics - Learn Relations and Functions] (28 January 2013) <br /> | [https://www.youtube.com/watch?v=b1xy4fVuY3U What is Signum Function in Mathematics - Learn Relations and Functions] (28 January 2013) <br /> | ||
| − | [https://www.youtube.com/watch?v=T_pGvvyjIkI Signum Function] (26 | + | [https://www.youtube.com/watch?v=T_pGvvyjIkI Signum Function] (26 August 2016) <br /> |
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[[Category:SpecialFunction]] | [[Category:SpecialFunction]] | ||
Revision as of 13:02, 17 September 2016
The signum function $\mathrm{sgn} \colon \mathbb{R} \rightarrow \{-1,0,1\}$ (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 $\mathrm{sgn}$.
Videos
What is Signum Function in Mathematics - Learn Relations and Functions (28 January 2013)
Signum Function (26 August 2016)
