#10963: More functorial constructions
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Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_review
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, | dbb17b11bb9e8f94b5d9d3424cd34c5efc82564c
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506 |
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Comment (by nthiery):
Hi Darij,
> I know this is not a big issue since the `dual()` of an algebra *is* a
coalgebra in all cases in which `dual()` is implemented (not least because
in the infinite-dimensional cases it usually means the graded dual). But
I'm still unhappy with the docstring lying in my face. Can anyone write a
reasonably worded .. WARNING about this `dual()` not being the actual
vector-space dual?
Yes, we need to clean up the distinction between dual and graded dual;
this is not completely obvious to set the things up so that we can
still share some code between the two. But this issue predates this
ticket: the code and documentation about dual objects is just being
moved around. Please create a separate ticket about this!
Cheers,
Nicolas
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New commits:
||[http://git.sagemath.org/sage.git/commit/?id=dbb17b11bb9e8f94b5d9d3424cd34c5efc82564c
dbb17b1]||{{{Fixed typo and improved documentation for
Magmas.Unital.Inverse}}}||
----
New commits:
||[http://git.sagemath.org/sage.git/commit/?id=dbb17b11bb9e8f94b5d9d3424cd34c5efc82564c
dbb17b1]||{{{Fixed typo and improved documentation for
Magmas.Unital.Inverse}}}||
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Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:336>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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