Karim BELABAS on Wed, 19 Jun 2002 17:33:58 +0200 (MEST)


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Re: nffactor() slowdown


On Tue, 18 Jun 2002, Igor Schein wrote:
> I compared nffactor's speed between 2.2.3 and 2.2.4, and latter
> is on average 10-25% slower on the type of polynomials I tried - large
> Galois polynomials over cyclotomic or quarternion fields.

(hence totally split polynomials ?)

Does nfroots suffer from the same problem ?

Can you post a few representative examples ?

    Karim.

P.S: it could be due to the change of bound for the coefficient size (from
Beauzamy back to Mignotte).
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Karim Belabas                    Tel: (+33) (0)1 69 15 57 48
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Université Paris-Sud             Email: Karim.Belabas@math.u-psud.fr
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