>Is there bugs where user gets wrong results (from factory)? I have seen 
only polynomials 
>giving error messages or halting randomly, but never wrong results


the (factory) stopgap http://trac.sagemath.org/ticket/17681

references a ticket (is a stopgap for)

http://trac.sagemath.org/ticket/17680

with a failing example. But there are more.

To find them I did millions of random examples for primary decomposition 
using two different variants GTZ and SY in Singular
In case the results did not coincide, there were bugs in 'primdec.lib' and 
sometimes in factory.



Jakob



Am Freitag, 13. Februar 2015 12:09:03 UTC+1 schrieb Jori Mantysalo:
>
> On Fri, 13 Feb 2015, Jakob Kroeker wrote: 
>
> > Factory is notoriusly buggy; it improved over time, but it is still 
> > buggy. There are more than 20 bugs in factory which are fixed in 4.0.1 
> > but not in 3.1.7 
>
> Is there bugs where user gets wrong results? I have seen only polynomials 
> giving error messages or halting randomly, but never wrong results. I ran 
> quite many test rounds, but only for multivariate QQ-polynomials. 
>
> -- 
> Jori Mäntysalo 
>

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