#1956: implement multivariate truncated power series arithmetic
-------------------------------------------+--------------------------------
Reporter: was | Owner: pernici
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7
Component: commutative algebra | Keywords: multivariate
power series
Work_issues: | Upstream: N/A
Reviewer: Martin Albrecht, Simon King | Author: Niles Johnson
Merged: | Dependencies:
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Comment(by malb):
This seems to be the current status:
1. Sage passes all doctests with this patch
waiting for patchbot :)
2. All code is documented and doctested thoroughly; documentation builds
without error or warning
'''positive review'''
3. The underlying concept of the implementation (a wrapper for certain
univariate power series over multivariate polynomials) is sound
'''positive review'''
4. multi_power_series_ring.py: the code accurately does what it claims to
do
'''positive review'''
5. multi_power_series_ring_element.py: the code accurately does what it
claims to do
'''needs review'''
6. Integration with the rest of sage: construction and use of
PowerSeriesRings works correctly, and parallels behavior of polynomial
rings
'''positive review'''
7. Performance: the multivariate power series arithmetic is fast enough to
be included in Sage
'''positive review'''
8. Coding: the code is free from obvious inefficiencies in error handling,
memory management, etc.
'''positive review'''
9. The items on this list constitute a complete review
'''positive review'''
----
Thanks for explaining the default precision business to me! As I said, I
rarely touch power series.
----
> Excessive or not, each of the double underscore methods is necessary to
replace the corresponding method of `PowerSeries` or
`PowerSeriesRing_generic`, from which the `MPowerSeries*` classes inherit.
Here's a complete list of the double underscore attributes:
Sorry, I didn't mean stuff like {{{__init__}}} which of course has to be
like it is. I meant stuff like {{{__poly_ring}}} which could easily be
{{{_poly_ring}}}.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/1956#comment:110>
Sage <http://www.sagemath.org>
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