rename Math.sign as Math.signum ??

# Roger Andrews (14 years ago)

Rename Math.sign as Math.signum ??

The sign function is often called "signum" in numerical libraries. Wikipedia says it's to avoid confusion with the sine function. @ en.wikipedia.org/wiki/Sign_function

Also, in the Complex plane, the sign function's range is on the circle of Unit Magnitude (UM). Which is kind of neat.