Thanks for your answer.
Le vendredi 10 mai 2013 22:15:37 UTC+2, David Roe a écrit :
>
> You can do:
>
> sage: K.=QuadraticField(2)
> sage: K.register_coercion(K.coerce_map_from(QQ) * QQ.coerce_map_from(ZZ))
>
> For even more speed you can write your own custom Cython coercion from ZZ
> to K.
>
T
You can do:
sage: K.=QuadraticField(2)
sage: K.register_coercion(K.coerce_map_from(QQ) * QQ.coerce_map_from(ZZ))
For even more speed you can write your own custom Cython coercion from ZZ
to K.
David
On Fri, May 10, 2013 at 12:59 PM, vdelecroix <20100.delecr...@gmail.com>wrote:
> Hi,
>
> Let K
Hi,
Let K be a quadratic number field (let say K = QuadraticField(2)).
There are "natural morphisms" implemented in Cython from ZZ to QQ and
from QQ to K. There is also an other way, somewhat more direct, to go
from ZZ to K. But at the end it is 10 times faster to go the first way
and Sage does no
