Revision history [back]

The Tachyon viewer option works, although this does not give you the ability to do live rotations. Try:

var('x,y')
plot3d(x^2+3*y^2,(x,-2,2),(y,-2,2),viewer='tachyon')

Another viewer that might work is canvas3d, but it's not working for me in the iPad Sage app. I'm not sure of the status of this viewer.