#10963: More functorial constructions
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Reporter: nthiery |
Owner: stumpc5
Type: enhancement |
Status: needs_review
Priority: major |
Milestone:
Component: categories |
Resolution:
Keywords: |
Work issues: Finish merging some changes in the primer
Report Upstream: N/A |
Reviewers: Simon King
Authors: Nicolas M. Thiéry |
Merged in:
Dependencies: #11224, #8327, #10193, #12895, #14516, #14722, #13589 |
Stopgaps:
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Comment (by SimonKing):
Why is there a double-underscore `__neg__` method as element method of
additive groups? The reason for the single underscore arithmetic methods
is, to my understanding, to enable the coercion model. But the coercion
model is not involved in the case of `__neg__`, isn't it? Hence, I think
one should keep it double underscore, and should not ask for an
implementation via a single underscore method.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10963#comment:31>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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