mabshoff <[email protected]> writes:
> Is this what you want?
Actually, I want:
(15) -> f := x*(y^2-x)^2+y^5; g := y^4+y^3-x^2
4 3 2
(15) y + y - x
Type: Polynomial(Integer)
(16) -> factor resultant(f,g,x)
9 2
(16) y (2y + 1)
Type: Factored(Polynomial(Integer))
(17) -> factor resultant(f::POLY PF 3,g::POLY PF 3,x)
2 9
(17) (y + 2) y
Type: Factored(Polynomial(PrimeField(3)))
(well, here it's 3 instead of 5, doesn't matter)
Well, I'll tell them to do the computation in ZZ, and reduce afterwards. But
this somewhat misses the point, paedagogically.
> ----------------------------------------------------------------------
> | Sage Version 3.2.3, Release Date: 2009-01-05 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
> sage: P.<x,y>=IntegerModRing(5)[]
> sage: f=x*(y^2-x)^2+y^5;
> sage: g=y^4+y^3-x^2
> sage: f
> x*y^4 + y^5 + 3*x^2*y^2 + x^3
> sage: g
> y^4 + y^3 - x^2
> sage: f.res
> f.reset_name f.resultant
> sage: f.resultant(g)
isn't that the same?
> It seems broken also in the current release :(
Yes. (upgrading would be next to impossible anyway) still, thanks
Martin
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