Equations for the Helicoid

The parametric equations for the helicoid are:

f[a,b](u, v) = (a*v*cos(u),a*v*sin(u), b*u)

0 <= u <= 2*pi, -d < v < d     d > 0.

(We chose d=4 for our pictures and movies).

Up: The Helicoid

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