On 3/19/07, Andrej Vodopivec <andrej.vodopivec at gmail.com> wrote:
> (%i2) s : 2*sum(k, k, 1, n);
> (%o2) 2*sum(k,k,1,n)
> (%i3) intosum(s);
> (%o3) 2*sum(k,k,1,n)
> (%i4) intosum(s);
> (%o4) 4*sum(k,k,1,n)
Wow, that's a good one. I find it is present in Maxima 5.11.0 + Clisp 2.39
(official release). I'm guessing that it is due to an in-place modification of
some kind, but I really don't know.
Robert