On Sun, Feb 19, 2012 at 4:38 AM, ObsessiveMathsFreak <obsessivemathsfr...@gmail.com> wrote: > Basically, I want to restrict the variables of a multivariate > polynomial to a certain set of symbols. > > B.variables() should return > [x,y] > instead of > [a,x,y] > > How can this be done.
I have a patch at http://trac.sagemath.org/sage_trac/ticket/12542 which provides a fix for this: sage: var('a,x,y') sage: f = a*x^10*y+3*x sage: B = f.polynomial(ring=SR['x,y']) sage: B.coefficients() [a, 3] The key is specifying that the resulting polynomial should live in the ring SR['x,y'] instead of (by default) SR['a,x,y']. --Mike -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
