On 12 January 2014 16:18, John Cremona <[email protected]> wrote:

>
>
>
> On 19 August 2013 08:59, John Cremona <[email protected]> wrote:
>
>> On 19 August 2013 01:29, Victor Miller <[email protected]> wrote:
>>
>>> John, Now I understand.  I will open a ticket.  I'd suggest that we add
>>> a new private method which will look at the curve and return True if it's
>>> one that has a fast method for computing the order.   I haven't looked, but
>>> is there sage code to compute Hecke characters, which is what's necessary
>>> to deal with curves with CM with small discriminants?
>>>
>>>
>> I think not.   Let's keep the first ticket limited to the cases j=0, 1728
>> which will be very easy, and have a second ticket for the larger task of
>> dealing with other small discriminants.
>>
>>
> Victor, did you make a ticket?  I could not find it.
>
>
>
It is now #15667, i.e.  http://trac.sagemath.org/ticket/15667 and I'll do
it.

John

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