#15303: Coercion discovery fails to be transitive
-------------------------------------+-------------------------------------
Reporter: nbruin | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.0
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: Simon King | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/SimonKing/ticket/15303 | 528a03535447d67f04dc16d0a22cc38def54f9f1
Dependencies: #14711, #15329, | Stopgaps:
#15331 |
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Comment (by SimonKing):
Oooops, what is that?
{{{
sage -t src/sage/schemes/projective/projective_morphism.py
**********************************************************************
File "src/sage/schemes/projective/projective_morphism.py", line 1326, in
sage.schemes.projective.projective_morphism.SchemeMorphism_polynomial_projective_space.canonical_height
Failed example:
f.canonical_height(Q,badprimes=[2])
Expected:
0.0013538030870311431824555314882
Got:
verbose 0 (3533: multi_polynomial_ideal.py, groebner_basis) Warning:
falling back to very slow toy implementation.
verbose 0 (3533: multi_polynomial_ideal.py, groebner_basis) Warning:
falling back to very slow toy implementation.
0.0013538030870311431824555314882
**********************************************************************
1 item had failures:
1 of 16 in
sage.schemes.projective.projective_morphism.SchemeMorphism_polynomial_projective_space.canonical_height
[481 tests, 1 failure, 8.40 s]
----------------------------------------------------------------------
sage -t src/sage/schemes/projective/projective_morphism.py # 1 doctest
failed
----------------------------------------------------------------------
Total time for all tests: 8.6 seconds
cpu time: 7.7 seconds
cumulative wall time: 8.4 seconds
}}}
So, why is the slow toy implementation being used when coercion is
changed?
--
Ticket URL: <http://trac.sagemath.org/ticket/15303#comment:122>
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