#15305: Allow natural morphism between tensor products
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.13
Component: coercion | Resolution:
Keywords: tensor product coercion | Merged in:
Authors: Travis Scrimshaw | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #15309 | Stopgaps:
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Comment (by tscrim):
Here are some timings with my patch (no CP changes):
{{{
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 1.01 ms per loop
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 1.01 ms per loop
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 1.04 ms per loop
}}}
With your patch:
{{{
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 482 us per loop
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 489 us per loop
sage: %timeit S2(S.an_element())
1000 loops, best of 3: 485 us per loop
}}}
So I'll use your patch with some minor changes.
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Ticket URL: <http://trac.sagemath.org/ticket/15305#comment:12>
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