#15710: Singular hangs in division of rational functions over cyclotomic field
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Reporter: ppurka | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: number fields | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #14333 | Stopgaps:
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Comment (by jdemeyer):
Agreed, it actually doesn't hang, just takes an extraordinary large amount
of time:
{{{
sage: %time F.<a>=CyclotomicField(49); G = F['z,w'].fraction_field();
1/G(a^28 + a^23 + 1)
CPU times: user 0.02 s, sys: 0.00 s, total: 0.02 s
Wall time: 0.02 s
}}}
{{{
sage: %time F.<a>=CyclotomicField(49); G = F['z,w'].fraction_field();
1/G(a^28 + a^23 - 1)
CPU times: user 11.64 s, sys: 0.06 s, total: 11.70 s
Wall time: 11.72 s
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15710#comment:13>
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