#19452: Fix PolynomialSequence
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Reporter: switzel | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.10
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: Stefan Witzel | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by {'newvalue': u'Stefan Witzel', 'oldvalue': ''}):
* component: PLEASE CHANGE => algebra
* type: PLEASE CHANGE => defect
* author: => Stefan Witzel
Old description:
New description:
The constructor of PolynomialSequence treats coefficient rings of
characteristic 2 specially when really it should treat finite fields
of characteristic 2 specially. As a result
PolynomialSequence(R, [])
will fail when R.characteristic() == 2 but R.degree() is not defined.
This happens in particular for infinite fields of characteristic 2.
The fix is to check whether R is a finite field and treat it generically
if not.
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Ticket URL: <http://trac.sagemath.org/ticket/19452#comment:1>
Sage <http://www.sagemath.org>
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