beginner questions: return on Maxima console and working with implicit functions



On Fri, 28 Sep 2012, Volker van Nek wrote:

> (%i5) load(to_poly_solve);
>
> Loading maxima-grobner $Revision: 1.6 $ $Date: 2009-06-02 07:49:49 $
> (%o5) "/usr/local/share/maxima/5.28.0/share/to_poly_solve/to_poly_solve.mac"
> (%i6) to_poly_solve(eqn, y);
>
> (%o6) %union([y = lambert_w(%e^-x)])

Ivo is on Ubuntu Precise, the Maxima version in which is 5.24.0.  I think 
that, in Maxima versions that early, the package that one loads is called 
"topoly_solver", not "to_poly_solve".  (I also don't think those earlier 
versions of the package can get the solution in terms of the Lambert W 
function).