#15698: conversion from polynomial fraction to its power series expansion
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Reporter: rws | Owner: rws
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.2
Component: algebra | Resolution:
Keywords: power series, | Merged in:
expansion, fraction | Reviewers: Marc Mezzarobba
Authors: Ralf Stephan, | Work issues:
Marc Mezzarobba | Commit:
Report Upstream: N/A | 50defe27ea0129109f5c42213f98bd83b6d10eb8
Branch: | Stopgaps:
u/mmezzarobba/15698-series_of_ratpoly|
Dependencies: |
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Comment (by rws):
Patchbot says:
{{{
File "src/sage/rings/power_series_ring.py", line 671, in
sage.rings.power_series_ring.PowerSeriesRing_generic._element_constructor_
Failed example:
PowerSeriesRing(PowerSeriesRing(QQ,'x'),'y')(1/(1+x), 5)
Expected:
1 - x + x^2 - x^3 + x^4 + O(x^5)
Got:
1 - x + x^2 - x^3 + x^4 - x^5 + x^6 - x^7 + x^8 - x^9 + x^10 - x^11 +
x^12 - x^13 + x^14 - x^15 + x^16 - x^17 + x^18 - x^19 + O(x^20) + O(y^5)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15698#comment:25>
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