'solve' doesn't work!

Solve only gives solutions valid for *all* values of parameters (as opposed
to variables).  For example:

(%i12) solve([x=a,x=-a],[x]);   <<< no solutions for all a
(%o12)                                []
(%i13) solve([x=a,x=-a],[x,a]);  <<< make a into a variable
(%o13)                         [[x = 0, a = 0]]



On Wed, Jun 12, 2013 at 11:38 AM, Henry Baker <hbaker1 at pipeline.com> wrote:

> Solve doesn't work, either!
>
> (%i7) d;
> (%o7)                            [d0, d1, d2]
> (%i8) eqns;
> (%o8) [d0 = c0 + b0, d1 = c1 + b1, d2 = c2 + b2, h0 = g0 + f0 - e0,
> h1 = g1 + f1 - e1, h2 = g2 + f2 - e2, f0 = e0 + b0, f1 = e1 + b1,
> f2 = e2 + b2, g0 = e0 + c0, g1 = e1 + c1, g2 = e2 + c2]
> (%i9) solve(eqns,d);
> (%o9)                                 []
> (%i10)
>
> _______________________________________________
> Maxima mailing list
> Maxima at math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima
>