3003.sagews

x,y,z = var('x, y, z'); H = (-y/(x^2+y^2), x/(x^2+y^2), 0)

VF=plot_vector_field3d(H, (x,-3,4), (y,-3,4), (z,-3,4))

VF.show(stereo='redcyan',perspective_depth=true)

4+6

10