#14982: Coercion from rings with coerce_embedding into constructions over those
rings is broken
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Reporter: mmezzarobba | Owner:
Type: defect | Status:
Priority: major | needs_review
Component: coercion | Milestone: sage-5.12
Keywords: embedding | Resolution:
Authors: Marc Mezzarobba | Merged in:
Report Upstream: N/A | Reviewers:
Branch: | Work issues:
u/mmezzarobba/coerce_embeddings | Commit:
Dependencies: | Stopgaps:
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Changes (by {'newvalue': u'Marc Mezzarobba', 'oldvalue': ''}):
* status: new => needs_review
* keywords: => embedding
* branch: => u/mmezzarobba/coerce_embeddings
* author: => Marc Mezzarobba
Comment:
Here's an attempt to fix the problem with a small change to the coercion
discovery algorithm. It does break a few things, but I'd argue it only
does so by exposing weaknesses in existing code. The other patches in the
series fix (or, in one case, work around) these weaknesses.
See the commit messages for details.
What do the experts say?
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Ticket URL: <http://trac.sagemath.org/ticket/14982#comment:3>
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