Karim BELABAS on Sat, 14 Sep 2002 22:38:53 +0200 (MEST)

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Re: Bug in subresext

On Sat, 14 Sep 2002, Graham Herrick wrote:
> I'm using Pari 2.1.1 on MacOS X (the version distributed by fink).
> I was doing some calculations and Pari said "*** bug in subresext,
> please report". This happens when inverting a polynomial modulo another
> polynomial when the coefficients (in Q) are fairly large.


  I just checked your example with pari-2.1.4 (current stable release), and
the bug has been corrected. I checked further, and it was in fact fixed
between 2.1.1 and 2.1.2. It was probably due to a stack corruption in a more
basic routine (presumably the addfrac item 2.1.2-Fixed-15).

So, you should upgrade! [hopefully, so will fink]

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/
PARI/GP Home Page: http://www.parigp-home.de/