On Wed, 26 Aug 2009, john_perry_usm wrote: > > Just yesterday I bumped up against factoring univariate polynomials in > QQbar (*not* CC). Being able to factor in QQbar would have a broad > impact (or maybe not, but at least on one ticket I was studying), but > I don't know about feasibility. > > regards > john perry
It's already essentially implemented, just not exposed: sage: f = QQbar['x'].random_element(7) - QQbar(2).sqrt() sage: f -2*x^7 - x^4 - 2*x^3 + 2*x^2 - x - 2.414213562373095? sage: f.roots() [(-0.7171741662738754?, 1), (-0.8861392795468010? - 0.7421111421692789?*I, 1), (-0.8861392795468010? + 0.7421111421692789?*I, 1), (0.3910288165366135? - 1.040117802100559?*I, 1), (0.3910288165366135? + 1.040117802100559?*I, 1), (0.8536975461471252? - 0.5399456095037692?*I, 1), (0.8536975461471252? + 0.5399456095037692?*I, 1)] - Robert --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
