In the ordinary case, is it possible to get the regular function
corresponding to some endomorphism?
On Wednesday, January 22, 2020 at 1:40:54 PM UTC-5, John Cremona wrote:
>
> I suspect the question might have been referring to elliptic curves over
> finite fields. In the ordinary case you can
I suspect the question might have been referring to elliptic curves over finite
fields. In the ordinary case you can ask for the Frobenius order and know that
the endomorphism ring is between that and the maximal order of its field of
fractions (an imaginary quadratic field) but as far as I know
On Tuesday, January 21, 2020 at 5:23:43 PM UTC-8, Eric Zhu wrote:
>
> Is there a way to get the endomorphism ring of an elliptic curve in Sage?
>
with
d=E.cm_discriminant()
you know that End(E) is the cm order of discriminant d. If E does not have
cm, then End(E)=Z
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