#8972: Inversion and fraction fields for power series rings
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Reporter: SimonKing | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.4.4
Component: algebra | Resolution: fixed
Keywords: power series ring, fraction field | Author: Simon King
Upstream: N/A | Reviewer: Robert Bradshaw
Merged: | Work_issues:
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Comment(by SimonKing):
I upgraded to sage-4.4.3.
I verified that all patches still apply.
With the patches, {{{sage -testall}}} passes.
On sage-devel, Robert asked how stable my Monsky-Washnitzer timing is.
Here is the answer:
Without the patches, I was running {{{sage -t
"devel/sage/sage/schemes/elliptic_curves/monsky_washnitzer.py"}}} 5 times,
and got
7.9 s, 2.4 s, 2.4 s, 2.4 s, 2.4 s
With the patches, I obtain
2.4 s, 2.5 s, 2.4 s, 2.4 s, 2.4 s
So, the timing did not improve, except for the first run. But at least
there was no slowdown.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8972#comment:32>
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