The parametric equations for the catenoid are:
f[a](u, v) = (a*cos(u)cosh(v/a), a*sin(u)cosh(v/a), v),
0 <= u <= 2*pi, -c < v < c.
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Created: May 8 1996 ---- Last modified: Sat May 18 13:14:39 1996
Copyright © 1996 by The Geometry Center, all rights reserved