#4749: [with patch; with positive review] improve coercion of points between
elliptic curves and reduction of points mod p
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Reporter: was | Owner: cswiercz
Type: enhancement | Status: assigned
Priority: major | Milestone: sage-3.4
Component: number theory | Resolution:
Keywords: elliptic curves |
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Changes (by cremona):
* summary: [with patch; needs work] improve coercion of points between
elliptic curves and reduction of points mod p
=> [with patch; with positive review] improve
coercion of points between elliptic curves and
reduction of points mod p
Comment:
OK, I relented. I have added a patch which addresses the specific bug.
There is still a case for something more general, but it is quite hard to
see how to get the __call__ function to do the right thing. There has to
be a way of telling in some more generality whether the base field of the
point is a residue field of the base field of the curve (I mean that the
other way round). So it's harder than I thought, and its 5.22pm on the
last Friday before a holiday, and the patch does do something which is
already useful, so let's go for it!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4749#comment:7>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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