Re: [Maxima-discuss] Why does 'solve' not work here?

[Martin K. <kr...@fh...>]

Barton,

thanks a lot for the hint  to Solver(), this could be a candidate for
standard solver of  our SMath Studio to Maxima interface. Are you aware of
any good reason to not prefer it over solve()? I really like the pragmatic
engineering approach described in the doc.

Martin

> -----Ursprüngliche Nachricht-----
> Von: Barton Willis [mailto:wi...@un...]
> Gesendet: Samstag, 15. Februar 2014 18:44
> An: Mark; max...@li...; fa...@be...
> Betreff: Re: [Maxima-discuss] Why does 'solve' not work here?
> 
> 
> > Given the two simultaneous equations:
> > sin(y) = 0 sin(x-y) = sin(y)
> > will Maxima solve them using a single input command, calling just a
single
> one of its built in functions?
> 
> I agree with Richard---almost  certainly the answer is no.  There are
three
> Maxima solvers: solve, to_poly_solve, and Solver. Maybe you will like
Solver
> the best:
> 
>   (%i7) load(Solver)$
> 
>   (%i8) Solver([sin(y) = 0, sin(x-y) = sin(y)],[x,y]);
>     solve: using arc-trig functions to get a solution.
>     Some solutions will be lost.
>     solve: using arc-trig functions to get a solution.
>     Some solutions will be lost.
>   (%o8) [[x=0,y=0]]
> 
> In the best of all possible worlds, a solve function would find the
solution set
> of these equations with no human intervention.  But again, the reason why
> to_poly_solve fails on this system isn't all that
> interesting: the limitation is purely the time and effort required to make
> to_poly_solve (or solve or Solver) better.
> 
> --Barton