# # Range and divisions for u and v # Domain {{-1 1 10} {-1 1 10}} # # f(u,v) = (u,v,2u^3-au-v^2) # Function {u v} { let (x,y,z) = (u, v, 2u^3 - a u - v^2) } # # Slider from 0 to 1 initially at 1 # Slider a 0 1 1