Originally Posted by

**topsquark** I tried to Google this but I don't know how to weed out things like the derivation of the quadratic formula and such.

Succinctly put we define a derivation as a map $\displaystyle \delta$ on real functions f and g with the property $\displaystyle \delta (f g) = g \delta (f) + f \delta (g)$

The problem is that I really only know one example: the derivative map. (I have seen one operating on "flows" but I'm getting a little lost on the topic.)

Does anyone know of any other derivations that have a more or less geometric interpretation?

Thanks!

-Dan