#8972: Inversion and fraction fields for power series rings
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Reporter: SimonKing | Owner: AlexGhitza
Type: defect | Status: needs_work
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: trouble with
schemes/elliptic_curves
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Changes (by SimonKing):
* work_issues: => trouble with schemes/elliptic_curves
Comment:
Hi Mike!
That probably means that the elliptic curves code expects the result of a
division of two power series to be another power series. But now, the
division yields a Laurent series.
I see two possibilities to proceed:
1. Search for all occurences of power series in Sage, see if a division
occurs, and change it so that things still work.
2. Change/extend the methods provided by Laurent series so that they
match those provided by power series. In that way, the code in
schemes/elliptic_curves still has a chance to work.
I'll see what I can do.
Best regards,
Simon
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8972#comment:25>
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