#14054: Cythoned UniqueRepresentation
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Reporter: SimonKing | Owner: tbd
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.8
Component: performance | Resolution:
Keywords: cython UniqueRepresentation | Work issues:
Report Upstream: N/A | Reviewers: Travis
Scrimshaw
Authors: Simon King | Merged in:
Dependencies: #14017, #6495, #14159 | Stopgaps:
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Comment (by SimonKing):
Back to the failing assertion:
By inserting information on the mismatching parents, I find that indeed we
get two distinct instances of the same parent `Free module generated by
{1, 2, 3, 4} over Integer Ring`.
So, how is it possible to create these distinct instances? Aha! They have
indeed been created in different ways. Namely, by printing the
`_reduction` attribute that is set during classcall, I found that
x.parent() is created with the arguments
{{{
(Integer Ring, {1, 2, 3, 4}), {'category': Category of modules with basis
over Integer Ring, 'prefix': 'y'})
}}}
but self.domain() is created using
{{{
(Integer Ring, {1, 2, 3, 4}), {'category': Category of modules with basis
over Integer Ring, 'prefix': 'G'})
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14054#comment:45>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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