Karim BELABAS on Thu, 5 Sep 2002 13:24:27 +0200 (MEST)


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Re: yet another rnfkummer() posting


On Wed, 4 Sep 2002, Igor Schein wrote:

> On Thu, Sep 05, 2002 at 01:17:45AM +0200, Karim BELABAS wrote:
> > My (relatively) simple regression tests come clear now [and so do a few of
> > the things you've reported, in particular the above bug]. Can you make a list
> > of all surviving regressions from your archives ?

> ? factorpadic(x^3-1,3,10,1);
>   ***   not enough precalculated primes

This one is fixed [recent typo in random_unif_loop_pol()]

> ? setrand(1);quadclassunit(-148-16!);
>   ***   sorry, buchxxx couldn't deal with this field PLEASE REPORT!.

So is this one [recent typo in imag_relations()]

> ? setrand(2126042356);rnfkummer(bnrinit(bnfinit(quadpoly(3409,y),1),25,1),[5,3;0,1]);
>   ***   division by zero in gdiv, gdivgs or ginv

Was that a regression ?? It looks like a simple precision problem, exhibited
by a change in the random seed (deep down...). I believe the bug existed
before my changes. Anyway, it should be gone now [stronger check in
get_arch_real]

========================================================================
> ? bnfisnorm(bnfinit(polsubcyclo(7,3)),2);
>   ***   inconsistent data in inverseimage.

I can't reproduce this one. Can you give further details ?

    Karim.
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Karim Belabas                    Tel: (+33) (0)1 69 15 57 48
Dép. de Mathematiques, Bat. 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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