On 1/27/09, Barton Willis <willisb at unk.edu> wrote: > Likely, the following bug might be due to code not in antid: > > (%i48) diff(f(x) * (f(x) + 1)^a,x)$ > (%i49) antidiff(%,x,f(x)); > Is a zero or nonzero?nonzero; > Maxima encountered a Lisp error: That's a good one. Seems to get into an endless loop in the Risch code. Not 100% sure about that. Robert