Begin forwarded message: > From: Genya Zaytman <[EMAIL PROTECTED]> > Date: March 31, 2008 1:15:21 PM EDT > To: David Harvey <[EMAIL PROTECTED]> > Subject: Fwd: Multivariate Polynomial Factoring is Broken > > > Begin forwarded message: >> From: Genya Zaytman <[EMAIL PROTECTED]> >> Date: March 31, 2008 1:14:39 PM EDT >> Subject: Multivariate Polynomial Factoring is Broken >> >> sage: version() >> 'SAGE Version sage-2.11, Release Date: 2008-03-30' >> sage: q = 1073741789 >> sage: T.<aa, bb> = PolynomialRing(GF(q)) >> sage: f = aa^2 + 12124343*bb*aa + 32434598*bb^2; f >> aa^2 + 12124343*aa*bb + 32434598*bb^2 >> sage: f.factor() >> (32434598) * (16373350*aa^2 + 437239695*aa*bb + bb^2) >> sage: g = (32434598) * (16373350*aa^2 + 437239695*aa*bb + bb^2); g >> aa^2 - 49344938*aa*bb + 32434598*bb^2 >> sage: f == g >> False >> >
So basically, in the example above, we factor a homogeneous degree 2 polynomial in two variables, multiply it back out and get a different answer. david --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
