#10963: More functorial constructions
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Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
public/ticket/10963 | Commit:
Dependencies: #11224, #8327, | bdefe0daeb7a4154a506f5ac69a064b6150f8de6
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506 |
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Comment (by SimonKing):
The lazy class attribute's documentation states:
{{{
The base category class is often another category with axiom,
therefore having a special ``__classget__`` method. Storing
the
base category class and the axiom in a single tuple attribute
--
instead of two separate attributes -- has the advantage of not
trigerring, for example, ``Semigroups.__classget__`` upon
``Monoids._base_category_class``.
}}}
I think this is actually not correct. If I am not mistaken,
`Finite.__classget__` is involved when doing `Fields().Finite`, but not
when calling `Fields()._base_category_class`.
In any case, a remark should be added that the classget will set the
`_base_category_class_and_axiom` attribute of `Fields().Finite()`.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:276>
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