Hi Joshua, As Mike pointed out, look in sage/interfaces/phc.py for what is already there. At Jan Verschelde's request I also recently updated the optional phcpack spkg to a recent version.
The problem with phcpack is that it is mostly written in Ada, and it seems unlikely in the medium term to become a standard package because of that. I have made some very minor attempts to write a homotopy solver in cython but its a very low priority project for me at the moment. I would recommend talking to Jan Verschelde and seeing if he has any suggestions for further work on integrating phcpack and sage. One flaw right now is that the interface I wrote uses pexpect, instead of the C interface that Jan and one of his students wrote recently. I'm not sure that would really make much of an impact in speed though, since parsing the output is not usually the bottleneck. Right now the 1-variable case is broken, there is a trac ticket for that (#4411). I have been lazy about fixing it since there are other good tools in sage for 1-variable problems. Fixing that would be pretty easy and give you a better idea of what the current capabilities are. There's also this @interact example on the wiki, which shows some of the graphical possiblities of sage+phcpack: http://wiki.sagemath.org/interact/algebra#NumericalSolutionsofPolynomialSystemswithPHCpack -Marshall Hampton On Feb 25, 12:36 am, Mike Hansen <mhan...@gmail.com> wrote: > On Wed, Feb 24, 2010 at 9:13 PM, Joshua Herman <zitterbeweg...@gmail.com> > wrote: > > Link tohttp://www.math.uic.edu/~jan/download.html > > > On Feb 24, 2010 11:12 PM, "Joshua Herman" <zitterbeweg...@gmail.com> wrote: > > > Are you guys interested in adapting phcpack for sage? Its a solver for > > polynominal homotopy? > > phcpack is already an optional package, and there is an interface to > it in sage/interfaces/phc.py, but maybe Marshall Hampton has a better > idea of improvements / work that could be done with it. > > --MIke -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
