# New pages

- 02:25, 21 October 2017 Mathematics : Real Numbers : Conditional Functions (hist) [507 bytes] Martin Vahi (talk | contribs) (Created page with " = [http://mathworld.wolfram.com/Sign.html Sign] Function = $ \begin{cases} -1 & \text{if } x < 0, \\ 0 & \text{if } x = 0, \\ 1 & \text{if } x > 0. \end{cases} $")