thx, this code is much better then mine :)

But If there's any build-in function... :)

@Axel Vogt because output of solve-command is in this format.. And after solve-command I need to substitute the result in definition of piecewise-function..

Example:

> solve((x-1)*(x-2)*(x-3) < 0, [x])

And then I need to define piecewice(x < 3 and 2< x or x < 1, 1, 2)

thx a lot :)