#18436: Dimension formulae do not accept Dirichlet characters with certain base
rings
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Reporter: pbruin | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.7
Component: modular forms | Resolution:
Keywords: Dirichlet | Merged in:
character dimension formula | Reviewers:
Authors: Peter Bruin | Work issues:
Report Upstream: N/A | Commit:
Branch: | a38e707bc54952c8ac5f84353c2d3566b206fb69
u/pbruin/18436-dimension_formulae | Stopgaps:
Dependencies: |
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Comment (by pbruin):
Replying to [comment:5 chapoton]:
> OK. Looks good to me, but I would prefer to check the characteristic of
K before
> changing the base of eps.
The line `eps = DirichletGroup(N, K)(eps)` doesn't change the base ring of
`eps`, just the level. Switching the order with the check for the
characteristic of `K` makes no difference except that this one line more
than necessary is executed in case of invalid input. I actually had
similar thoughts as you while I was writing the patch, and decided on what
I think is a fairly logical ordering of the code. I don't think we would
gain a lot by modifying the order.
--
Ticket URL: <http://trac.sagemath.org/ticket/18436#comment:6>
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