Karim BELABAS on Fri, 6 Dec 2002 18:14:10 +0100 (MET)


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Re: 2 changes in the CVS


On Fri, 6 Dec 2002, Igor Schein wrote:

> On Fri, Dec 06, 2002 at 03:12:55PM +0100, Karim BELABAS wrote:
>> While we are at it: I have enabled Karatsuba multiplication for t_REAL (code
> There're a couple of oopses:
>
> ? quadray(-300003,1);
>   ***   bug in GP (Floating Point Exception), please report
> ? bnrstark(bnrinit(bnfinit(y^4-820*y^2+151290),1,1),0);
>   ***   bug in ComputeArtinNumber, please report
>
> The 2nd one used to behave like this:
>
> ? bnrstark(bnrinit(bnfinit(y^4-820*y^2+151290),1,1),0);
>   ***   Not enough precomputed primes (need all p <= 1704043120).

Badly normalized numbers in (output of) Karatsuba mulrr.
Fixed.

    Karim.
-- 
Karim Belabas                    Tel: (+33) (0)1 69 15 57 48
Dép. de Mathématiques, Bât. 425  Fax: (+33) (0)1 69 15 60 19
Université Paris-Sud             Email: Karim.Belabas@math.u-psud.fr
F-91405 Orsay (France)           http://www.math.u-psud.fr/~belabas/
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