#6837: Implementation of twisting modular forms by Dirichlet characters
-------------------------------------+-------------------------------------
Reporter: ljpk | Owner: craigcitro
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.4
Component: modular forms | Resolution:
Keywords: modular form | Merged in:
twist character | Reviewers:
Authors: Lloyd Kilford, | Work issues:
Alex Ghitza, Peter Bruin | Commit:
Report Upstream: N/A | 5f5694a40ca5adba4b249b7349913cdae7652eb6
Branch: | Stopgaps:
u/pbruin/6837-modular_form_twist |
Dependencies: |
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Changes (by pbruin):
* status: needs_work => needs_review
Comment:
Replying to [comment:20 wuthrich]:
> I tested this and all test passed. However, I am not sure about the
implementation. There is only one (rather trivial) test in the
documentations. So I played around a bit.
Thanks!
> Currently it fails if the form is a {{{NewForm}}} as explained in
#18086 .
I moved the method to the class `ModularFormElement`, so that `Newform`
does not even have a `twist` method anymore until #18086.
> It also fails if f does not have a neben character:
> [...]
> Similarly it fails when the character has values outside the field of
coefficients of f:
> [...]
Both of these should now be fixed. I added different examples to the
doctests than the ones you gave because they seemed to take forever.
--
Ticket URL: <http://trac.sagemath.org/ticket/6837#comment:22>
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