[Maxima] Bfloat allroots
fateman at cs.berkeley.edu
Sat Dec 13 10:15:40 CST 2008
Modeling Maxima's bigfloats as a separate package would make it more
drop in an alternative, especially MPFR, at some future stage, into Maxima.
I would prefer that MPFR be callable from within Maxima, rather than
outside control. E.g. Sage would presumably look at a problem
and try to decide between MPFR and Maxima, making Maxima appear to be,
and in fact, less capable than Sage in this respect [assuming MPFR is
"better" than what the 2 or 3 people
here have done with bfloats, and that MPFR will be pushed further by
I thought we had better root-finding in the FORTRAN routines. There is a
method that is supposedly better than Jenkins-Traub. Converting that to
might be good. (In fact, I think I have a Laguerre method written in
Lisp from first
principles, but it was done by a student who didn't totally inspire
Robert Dodier wrote:
> On 12/12/08, Raymond Toy <raymond.toy at ericsson.com> wrote:
>> Perhaps this can be placed in cpoly.lisp or maybe as a contrib in
> Since it 's a bigfloat version of an existing algorithm,
> I would put it in the same place as the existing one.
>> Also, I should probably also convert rpoly-sl to support bfloats, and
>> then allroots and bfallroots will be functionally identical.
> OK by me.
> Maxima mailing list
> Maxima at math.utexas.edu
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