Signum function
Revision as of 18:49, 27 September 2008 by Herefishyfishy1 (talk | contribs)
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)
Properties
- The signum function is odd.
is equal to 
for 
.
for 
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