On Oct 7, 5:07 am, "ma...@mendelu.cz" <ma...@mendelu.cz> wrote:
> On 7 říj, 10:53, Robert Bradshaw <rober...@math.washington.edu> wrote:
>
> > On Oct 7, 2009, at 1:40 AM, ma...@mendelu.cz wrote:
>
> > By insecure, I assume you mean it returns bogus answers?
>
> Yes, if we substitute initial conditions and solve for constants %k1,
> %k2, then
> %k1, %k2 may depend on x and y and thus substitution into general
> equations produces answer which is not correct.
>
> If ic2 gets fixed by maxima folks, how fast will the change propagate
> to Sage? Is it better to wait for the fix or introduce fixed version
> of ic2 into the desolvers.py? Which option is preferred by sage
> developers?
It depends on how soon we decide to get a new Maxima into Sage. Given
that Maxima upgrades usually have lots of new functionality and
bugfixes BUT also on occasion introduce small new bugs, historically
that hasn't happened very often. I feel like there is some traction
growing around doing it more often, though.
Probably the best thing to do is fix whatever you need to in order to
ensure an error you know about doesn't hit users, but then open a
ticket as soon as you know Maxima has fixed this - a general "upgrade
Maxima to version X" or something might be helpful, though hopefully
there wouldn't be too many duplicate tickets.
- kcrisman
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