On Fri, Jul 20, 2012 at 03:40:44PM +0200, Martin Rubey wrote:
> Well, in the code for determinants, you find
>
> if algorithm is None:
> try:
> R_is_field_attempt = R.is_field()
> except NotImplementedError:
> R_is_field_attempt = False
>
> Now, if R is a tensor product of some symmetric function space, the
> method is_field doesn't exist, so we get an
>
> AttributeError: 'CombinatorialFreeModule_Tensor_with_category'
> object has no attribute 'is_field'
Ok, one should add a method Rings.ParentMethods.is_field that raises a
NotImplementedError.
I'll try to look more at your other e-mails around August 1st. In the
mean time, you might want to dig in the MuPAD-Combinat code / mailing
list for the plethysm implementation. Good luck in any cases!
Cheers,
Nicolas
--
Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
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