#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-4.4.2
Component: algebra | Keywords: power series ring, fraction field
Author: Simon King | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: needs_work => needs_review
* work_issues: segfault of div of Laurent series =>
* author: => Simon King
Comment:
OK, I replaced the old patch, and now it seems to work!
For example:
{{{
sage: P.<t> = ZZ[]
sage: R.<x> = P[[]]
sage: 1/(t*x)
1/t*x^-1
sage: (1/x).parent() is FractionField(R)
True
sage: Frac(R)
Laurent Series Ring in x over Fraction Field of Univariate Polynomial Ring
in t over Integer Ring
}}}
The doc tests for the two modified files pass. So, ready for review!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8972#comment:4>
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