[sage-devel] Re: polynomial resultant problem

2012-03-27 Thread Ben Hutz
Yes, the sylvester matrix is not the most efficient, but in this small example seemed like the easiest way to convey my point. So this is really a matter of context and is expected behavior? If so, that means the trac ticket I filed: Ticket #12752 is not actually a defect, but is really an enhanc

[sage-devel] Re: polynomial resultant problem

2012-03-26 Thread Nils Bruin
On Mar 25, 6:52 pm, Ben Hutz wrote: > The resultant of two homogeneous polynomials can return an incorrect > value: > R.=PolynomialRing(ZZ) > f=6*x^2 + x*y + y^2 > g=y^2 > print f.resultant(g) > m=matrix([[6,1,1,0],[0,6,1,1],[0,0,1,0],[0,0,0,1]]) > m.determinant() > > notice that the coefficient o