#9980: Deprecate functionality of `PowerSeriesRing` which conflicts with
construction of multivariate power series
-----------------------------------+----------------------------------------
Reporter: niles | Owner: malb
Type: defect | Status: new
Priority: major | Milestone:
Component: commutative algebra | Keywords: power series, deprecation
warning
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Multivariate power series are implemented by #1956. As mentioned on that
ticket, the existing code for `PowerSeriesRing` did not allow multivariate
power series rings to be constructed using the same arguments as
multivariate polynomials accept:
{{{
sage: T = PowerSeriesRing(QQ,3,'t'); T
Multivariate Power Series Ring in t0, t1, t2 over Rational Field
sage: T = PowerSeriesRing(QQ,'t',3); T
Power Series Ring in t over Rational Field
sage: T.default_prec()
3
sage: P = PolynomialRing(QQ,'t',3); P
Multivariate Polynomial Ring in t0, t1, t2 over Rational Field
}}}
There is a non-trivial body of code (elliptic curves, and maybe p-adics)
which makes use of this syntax.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9980>
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