On 2012-05-03, Simon King <simon.k...@uni-jena.de> wrote:
> .... Then, the third solution of your
> problem would be
>     def __init__(self, i):
>         CommutativeRing.__init__(self, i.base_ring(), category=False)
>         self._ideal = i
>         self._init_category_(CommutativeRings()) # or whatever is appropriate

Oops, I mean CommutativeAlgebra.__init__(...) and
CommutativeAlgebras(i.base_ring()), of course.

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