Art of Problem Solving
AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy
Small live classes for advanced math
and language arts learners in grades 2-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

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>{1for x>0,−1for x<0,0for x=0.</cmath>)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

The signum function, denoted $\text{sgn}(x)$, is equal to \[\begin{cases} 1 & \text{for } x > 0,\\ -1 & \text{for } x < 0, \\ 0 & \text{for } x=0.\end{cases}\]

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=Signum_function&oldid=27997"