#18663: Speed up computation of twists of newforms
-------------------------------------+-------------------------------------
Reporter: davidloeffler | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.8
Component: modular forms | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/davidloeffler/better_twists | 91d4941180104d20e3633ff0002295725de56db9
Dependencies: #18478 | Stopgaps:
-------------------------------------+-------------------------------------
Changes (by pbruin):
* status: needs_review => needs_work
Comment:
One of the doctests still fails, this time because the effect of setting
`check=False` is changed:
{{{
File "src/sage/modular/modform/element.py", line 1192, in
sage.modular.modform.element.Newform.twist
Failed example:
Delta.twist(chi, level=3, check=False) # long time
Exception raised:
...
RuntimeError: twist of q - 24*q^2 + 252*q^3 - 1472*q^4 + 4830*q^5 +
O(q^6) by Dirichlet character modulo 1 of conductor 1 is not a newform in
Cuspidal subspace of dimension 3 of Modular Forms space of dimension 5 for
Congruence Subgroup Gamma0(3) of weight 12 over Cyclotomic Field of order
1 and degree 1
}}}
We should either just remove this doctest, or find a new example to
document that `check=False` can lead to wrong results.
--
Ticket URL: <http://trac.sagemath.org/ticket/18663#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
