On Wed, Jan 28, 2009 at 11:37 AM, David Hansen <da...@mollerhansen.com> wrote:
> I've attached the code in a .txt file.
Change the first few lines to this:
curve = E.plot(rgbcolor = (0,0,1),xmin=25,xmax=25,plot_points=300)
R = P + Q
Rneg = -R
l1 = line_from_curve_points(E,P,Q)
l2 = line_from_curve_points(E,R,Rneg,style='--')
p1 = plot(P,rgbcolor=(1,0,0),pointsize=40)
Then it works.
There are two issues:
I changed plot(E, ...) to E.plot(...) because of a major bug in plot
caused by some recent refactoring, which I've reported here (note that
I also got bitten by this during my Sage Days 12 talk!):
http://trac.sagemath.org/sage_trac/ticket/5121
Second, I had to change point(P, ...) to plot(P, ...) since point now
tries to see if there are 3 coordinates (there are since P is a point
on elliptic curve) and somehow gets confused.
This bug is
http://trac.sagemath.org/sage_trac/ticket/5122
William
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