#16508: Add Commutative graded differential algebras.
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Reporter: mmarco | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: algebra | Resolution:
Keywords: sd58, sd59, | Merged in:
algebras, nonconmutative, graded | Reviewers:
Authors: mmarco | Work issues:
Report Upstream: N/A | Commit:
Branch: | 61487e692af1d715e7cc4281714b7fb0705c542f
u/mmarco/ticket/16508 | Stopgaps:
Dependencies: |
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Comment (by mmarco):
Thanks for the work. I will leave on holidays tomorrow, so don't know when
i will have time to look at it.
Just a few quick comments:
About the names... it seems to be several choices in the literature. I am
ok with any of them.
About the filing tests, as i mentioned before, is a problem that comes
inherited from g-algebra quotients. It should be fixed in a different
ticket.
About the conversion between different quotients, i think it is ok. It is
a conversion, not a coercion, so we can be much less strict. I think it
makes sense to convert between parents with the same kind of structure and
generators with the same names.
About initializing without names and degrees, i think raising an error is
the right thing to do. It is what happens if, for instance, you try to
create a polynomial ring without the names of the generators.
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Ticket URL: <http://trac.sagemath.org/ticket/16508#comment:26>
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