On 2013-02-16, Rupert Swarbrick <rswarbrick at gmail.com> wrote:
> We could insert a call to REMOVE-DUPLICATES on the equation list before
> deciding what to do, but I think this would be fooled by pretty
> obviously identical equations (eg. x+y and y+x are different; x*(1+x)
> and x+x^2 are different...). I'm not sure whether it makes much sense to
> try and do anything cleverer - calling expand on the equations might be
> a bit bonkers...
Agreed on both points.
> So, in my opinion, this isn't really a bug. The weird behaviour is that
> SSOLVE returns a sort of partial result when it gets stuck and SOLVEX
> returns an empty list. Weirdness like this is why I don't call solve()
> in scripts and instead rely on eg. algsys() where at least I know what
> I'll get if it fails.
Hmm. I think SSOLVE should return an empty list if it can't find a
solution.
best,
Robert Dodier