#19137: Use inverse_series_trunc in power series
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.9
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* status: new => needs_review
Comment:
I am not sure about what should be the parent of `~s` if `s` is a power
series over the integer ring. To follow the standard with integers, it
should be the power series ring with coefficients in `QQ`... Right now we
have
{{{
sage: R.<t> = PowerSeriesRing(ZZ)
sage: ~R(2)
Traceback (most recent call last):
...
ValueError: constant term is not a unit
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19137#comment:1>
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