On Mar 19, 10:46 am, mmarco wrote: > I would need to deal with exterior algebras, and as far as i have > seen, they are not defined in sage. I could try working on > implementing them, but i have no idea how to build the corresponding > class in sage. > > What should be the appropiate aproach? Is there some documentation > about how to build new ring classes?.
Here is an implementation of exterior algebras in sage: http://sporadic.stanford.edu/bump/exterior.sage This uses combinatorial_algebra.py. That has a deprecation warning (do not use). I think that means that you should not use it for code that is going into Sage itself, but it sure is handy to be able to implement a ring in just a few lines. The exterior algebra on [0, 1, 2, 3] After attaching the file, you can do this: sage: E = ExteriorAlgebra(4); E sage: [x0, x1, x2, x3] = E.generators() sage: x0*x1 x0*x1 sage: x1*x0 -x0*x1 sage: (x0+x1*x2+x3)*x0 -x0*x3 + x0*x1*x2 Daniel Bump -- 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 To unsubscribe from this group, send email to sage-devel+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
