#15201: Problem with Hecke eigenvalues with the same index as the level
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Reporter: fstromberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.12
Component: number theory | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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It seems to be a problem to compute Hecke eigenvalues for Modular Symbol
subspaces at integers dividing the level N unless the eigenvalue for the
Hecke operator at N is computed first.
I have verified this problem for sage versions between 5.8 and 5.12.beta.
Example::
sage: M=ModularSymbols(5,6,sign=1)
sage: S=M.decomposition()
sage: f=S[0]
sage: f.eigenvalue(10)
IndexError Traceback (most recent call
last)
...
IndexError: n must be a positive integer
sage: f.eigenvalue(5)
25
sage: f.eigenvalue(10)
50
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Ticket URL: <http://trac.sagemath.org/ticket/15201>
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