Signum function
Revision as of 19:43, 19 September 2008 by Herefishyfishy1 (talk | contribs) (New page: The signum function, denoted <math>\text{sgn}(x)</math>, is equal to <cmath>\begin{cases} 1 & \text{for } x > 0,\\ -1 & \text{for } x < 0, \\ 0 & \text{for } x=0.\end{cases}</cmath>)
The signum function, denoted 
, is equal to ![\[\begin{cases} 1 & \text{for } x > 0,\\ -1 & \text{for } x < 0, \\ 0 & \text{for } x=0.\end{cases}\]](http://latex.artofproblemsolving.com/4/c/9/4c9c26ce36b5f12f0ba41f4f24d9b03bfe67cf9c.png)
