#6800: formal/lazy/infinite powerseries
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Reporter: Henryk.Trappmann | Owner: burcin
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.2
Component: algebra | Resolution:
Keywords: LazyPowerSeries | Merged in:
Authors: Henryk Trappmann | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by rws):
I think although there is `combinat.species.series.LazyPowerSeries` this
implementation would still be good to have, as the implementation in
combinat misses many features included here. It is also needed for
P-finite sequences.
However, I don't think it's right to define all special functions anew:
the ring or a static function should be able to create a series from a
symbolic expression (interpreted as e.g.f.), and , in case of a rational
polynomial, delegate to CFiniteSequence (#15714).
There were a few failures:
{{{
1 of 39 in sage.rings.formal_powerseries.FormalPowerSeries
1 of 6 in sage.rings.formal_powerseries.FormalPowerSeries.nipow
1 of 6 in sage.rings.formal_powerseries.FormalPowerSeries.pow
3 of 8 in sage.rings.formal_powerseries.FormalPowerSeries0.abel
1 of 4 in sage.rings.formal_powerseries.decidable0
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/6800#comment:5>
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