On 19 June 2014 11:36, David Joyner <[email protected]> wrote:
> On Thu, Jun 19, 2014 at 4:05 AM, John Cremona <[email protected]> wrote:
>> The actual error message is very clear:
>>
>> NotImplementedError: Computation of dimensions of weight 1 cusp forms
>> spaces not implemented in general
>>
>> This -clearly - means that no formula or algorithm has been
>> implemented in Sage for dimensions of weight 1 modular form spaces.
>> How much clearer could it be?!
>>
>
> I think that "by improve this", M. is asking if there is a plan to implement
> one (soon?). I guess not, but I don't know if someone is currently working
> on this or not.

I don't know either.  The traditional response in such a situation is
"implement it and submit a patch".  But I don't think that there is a
forumula in the weight one case (as there is in higher weights) so it
will not be easy.  See
http://magma.maths.usyd.edu.au/magma/handbook/text/1528 for what Magma
does.  I am not an expert on this, but I think that it is not at all
easy.

 John

>>
>> On 19 June 2014 02:45, David Joyner <[email protected]> wrote:
>>> Does anyone know the answer to this?
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: M. <...>
>>> Date: Wed, Jun 18, 2014 at 8:43 PM
>>> Subject: Sage ModularForms() error?
>>> To: [email protected]
>>>
>>>
>>> David Joyner,
>>>
>>> When using the sagecell.sagemath.org server,
>>> when I evaluate the command:
>>>
>>>   ModularForms(Gamma1(29),1).basis()
>>>
>>> the error message is not very informative.
>>> The problem comes from the fact that
>>> "ModularForms(Gamma1(29),1)" has an
>>> "(unknown)" dimension currently. However,
>>> Magma returns [] for the basis using the
>>> Magma Calculator online. Is it possible to
>>> improve this situation? Shalom, M.
>>>
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