Ralf Hemmecke wrote:
>
> But...
>
> with the same polynomial as UP one can seemingly make FriCAS run
> forever. Even after your patch.
>
> Ralf
>
> (1) -> P ==> UnivariatePolynomial('x, Integer)
> Type:
> Void
> (2) -> R ==> UnivariatePolynomial('y, P)
> Type:
> Void
> (3) -> r: R := (4*x^3+2*y^2+1)*(12*x^5-x^3*y+12)*(y^2+3)
>
> (3)
> 3 5 5 4 6 3 3 8 5 3 2
> - 2x y + (24x + 24)y + (- 4x - 7x )y + (48x + 84x + 48x + 84)y
> +
> 6 3 8 5 3
> (- 12x - 3x )y + 144x + 36x + 144x + 36
> Type:
> UnivariatePolynomial(y,UnivariatePolynomial(x,Integer))
> (4) -> factorPolynomial r
>
> >> System error:
> Interactive interrupt at #x1002074A7B.
Should be fixed now. Hensel lift routine in PFBRU (and probably also
in PRFR) was buggy. Now we use Hensel lift from MLIFT.
As a byproduct instead of 5 different Hensel lift routines
we have 3...
--
Waldek Hebisch
[email protected]
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