On 3/20/12 4:06 AM, Jan Groenewald wrote:
u, v = var('u,v')
f_x = cos(u)*(4*sqrt(1-v^2)*sin(abs(
u))^abs(u))
f_y = sin(u) *(4*sqrt(1-v^2)*sin(abs(u))^abs(u))
f_z = v
parametric_plot3d([f_x, f_y, f_z], (u, -pi, pi), (v, -1, 1),
frame=False, color="red")
For the record, it works fine for me (OSX 10.6.8):
http://sagenb.org/home/pub/4583/
Thanks,
Jason
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