#14899: Anticanonical hypersurfaces cannot handle finite fields
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Reporter: novoselt | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.12
Component: algebraic geometry | Resolution:
Keywords: toric | Merged in:
Authors: Andrey Novoseltsev | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Dependencies:
Stopgaps: |
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Description changed by vbraun:
Old description:
> As originally reported on sage-devel: https://groups.google.com/d/topic
> /sage-devel/4QPBF_BDnfE/discussion
>
> The problem is that coefficients are converted to the symbolic ring and
> then back, which does not work (and is a bug of symbolic ring / finite
> field coercion). A workaround which may help in other cases and improve
> speed is to go through symbolic ring only when direct conversion fails.
> (Which, of course, is the bug for the corresponding ring and has to be
> solved as well...)
New description:
As originally reported on sage-devel: https://groups.google.com/d/topic
/sage-devel/4QPBF_BDnfE/discussion
The problem is that coefficients are converted to the symbolic ring and
then back, which does not work (and is a bug of symbolic ring / finite
field coercion). A workaround which may help in other cases and improve
speed is to go through symbolic ring only when direct conversion fails.
(Which, of course, is the bug for the corresponding ring and has to be
solved as well...)
Apply
* [attachment:trac_14899_fraction_field_string.patch]
*
[attachment:trac_14899_limit_SR_conversion_in_anticanonical_hypersurface.patch]
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Ticket URL: <http://trac.sagemath.org/ticket/14899#comment:11>
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