It would be *very* helpful, though, to have an optional parameter for
all solve variants (%solve, etc.) for a maximum timeout, that could be
set at different levels for different hardware. Do the earlier posts
imply this is not possible to do in Lisp, or at least pretty
difficult?
> Subject: Re: [Maxima] max time limit for solve
> Message-ID: <4B60AF9A.4020303 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> nijso beishuizen wrote:
> > Hi,
> >
> > The equation I try to solve is the final step in the solution of a
> > nonlinear ode. The solution in the paper
> > (of Cheb-Terrab and Kolokolnikov, it's on ArXiv) is given in implicit
> > form as:
> >
> > sol : x + 1/(3*x^3*(y+x)^3)+x^(1+a)/(1+a) = %c;
> >
> Nijso,
>
> Is this from E. S. Cheb-Terrab, T. Koloknikov, First Order ODEs,
> Symmetries and Linear Transformations, European Journal of Applied
> Mathematics, Vol. 14, No. 2, pp. 231-246 (2003)? I wrote an
> implementation of this as part of the contrib_ode function. Look in
> the share/contrib/diffequations/ directory. The code is ode1_lie.mac
> and the examples and unit tests are in the tests subdirectory
>
> The code works well for some cases but runs "forever" for other cases.
> There are a number of test cases from Kamke and Murphy that are
> commented out for this reason. I understand that the Maple routine
> doesn't have the same problem. I haven't been able to fix this.
>
>