On Wed, Jun 09, 2010 at 06:28:54AM -0700, Christian Stump wrote:
> HI Nicolas,
>
> > Hmm. I would need to better know the mathematics behind to give any
> > useful answer. My (little) understanding was that the main point of
> > the Zumbroich basis was to avoid such dependencies.
>
> see my answer above.
Thanks. I'll indeed discuss this next week.
> > Please send me the smallest piece of code that triggers this, for me
> > to investigate.
>
> class FieldAndFreeModule(CombinatorialFreeModule):
> def __init__(self):
> CombinatorialFreeModule.__init__(self, QQ, ['a'],
> category=Fields)
It works with ``Fields()`` instead of ``Fields``. Mmm, the error
message should have been more explicit.
> Maybe, but the category Fields did not work yet. As the UCF is only a
> CombinatorialFreeModule, I get
>
> sage: F =
> UniversalCyclotomicField()
> sage: F.Element.__div__?
> ...
> Division by coefficients
>
> and __invert__ is not yet there.
Ok. For the moment, you will probably have to implement both __div__
__invert__.
> The code should be on the track server, ticket 8327.
Ok. I'll try to investigate at this; alas not time today.
Cheers,
Nicolas
--
Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
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