piece wise linear approximation of x**n

[Martin Czech]

> A very cheap way to make x**n where n is an integer, is to 
> take a sawtooth and succesively integrate it.
> 
> If you do this at a high frequency (like in a pulse width 
> amplifier) and sample the n th output when the input 
> sawtooth level is equal to x, then you get x**n if 
> everything is scaled right.
> 
Mmm interesting principle.

But I was more after a continous time function for wave shaping.

m.c.