3D plot of vector not working
v = vector([1,2,3]) show(v)
plot(v, viewer='threejs', online=True)
E.<x,y,z> = EuclideanSpace() A = E.point((4,3,2), name='A') v = E.tangent_space(A)((1,2,1), name='v') # a vector at A A.plot(size=20, color='red', opacity=0.5) + v.plot(color='green')