Maxima not solving a linear system



On 5/23/06, Stavros Macrakis <macrakis at gmail.com> wrote:

> After fixing the typo (e1 -> eq2), my system (Maxima 5.9.3 GCL 2.6.7 Windows
> XP) also ran out of storage (not during display, during calculation).
>
> On the other hand, if you take each of the coefficients and make them into a
> variable ( e.g. x1*y1 -> x1y1, x1^2 -> x12), it comes back very quickly,
> though the answer is of course large.  Presumably you can subst back in, but
> I haven't tried.  I don't know why solve is having such a problem with the
> original coefficients.

We might want to try to get to the bottom of this. I'm guessing that
the problem is ratsimp or factor or something which is not supposed
to take too long. I suspect that the problem is not in the computation
itself but in simplification of partial results or something like that.

FWIW
Robert