#1234: [with patch; needs review] analytic_rank crashes
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Reporter: zimmerma | Owner: was
Type: defect | Status: new
Priority: minor | Milestone: sage-3.4.1
Component: algebraic geometry | Resolution:
Keywords: |
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Changes (by was):
* summary: analytic_rank crashes => [with patch; needs review]
analytic_rank crashes
Comment:
The attached patch cleans up the exceptions raised, as requested. Also,
in the (default) case where Cremona's gp script is used, the precision is
automatically doubled until it doesn't fail. I also start the precision
at 16 rather than the default, since it will get automatically double if
necessary, and it's about 3 times faster usually by using this smaller
precision to start:
{{{
BEFORE:
sage: E = EllipticCurve('5077a')
sage: time E.analytic_rank()
CPU times: user 0.01 s, sys: 0.01 s, total: 0.02 s
Wall time: 0.21 s
AFTER:
sage: E = EllipticCurve('5077a')
sage: time E.analytic_rank()
CPU times: user 0.02 s, sys: 0.00 s, total: 0.02 s
Wall time: 0.06 s
and another
BEFORE:
sage: time elliptic_curves.rank(4)[0].analytic_rank()
CPU times: user 0.01 s, sys: 0.00 s, total: 0.01 s
Wall time: 0.50 s
4
AFTER:
sage: time elliptic_curves.rank(4)[0].analytic_rank()
CPU times: user 0.01 s, sys: 0.00 s, total: 0.01 s
Wall time: 0.33 s
4
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/1234#comment:8>
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