Opened 11 years ago
Last modified 6 years ago
#10085 new defect
The gen() method for power series over power series works incorrectly
Reported by: | schilly | Owned by: | sage-combinat |
---|---|---|---|
Priority: | major | Milestone: | sage-6.4 |
Component: | combinatorics | Keywords: | LazyPowerSeries |
Cc: | axel.bacher@…, mhansen, mantepse | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
If I type the following:
S1 = LazyPowerSeriesRing(ZZ) S2 = LazyPowerSeriesRing(S1) y = S2.gen() y.coefficient(1) == 1
I get True, and
y.coefficient(1).coefficient(0)
gets me the "'int' object has no attribute 'coefficient'" error message.
I solved the problem by changing the following line in the gen() method:
res = self._new_initial(1, Stream([0,1,0]))
by
res = self.term(1, 1)
The coefficient of order 1 in the series y should not be the integer 1, but the power series [1, 0, ...] in S1.
Change History (9)
comment:1 Changed 11 years ago by
- Description modified (diff)
comment:2 Changed 11 years ago by
- Cc mhansen added
- Component changed from symbolics to combinatorics
- Owner changed from burcin to sage-combinat
comment:3 Changed 8 years ago by
- Milestone changed from sage-5.11 to sage-5.12
comment:4 Changed 7 years ago by
- Cc mantepse added
- Keywords LazyPowerSeries added
comment:5 Changed 7 years ago by
comment:6 Changed 7 years ago by
- Milestone changed from sage-6.1 to sage-6.2
comment:7 Changed 7 years ago by
- Milestone changed from sage-6.2 to sage-6.3
comment:8 Changed 7 years ago by
- Milestone changed from sage-6.3 to sage-6.4
comment:9 Changed 6 years ago by
- Description modified (diff)
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A fix is in #15673