Pseudocatenoid
By Roger Bagula
Graphics by
Paul Bourke
January 2003
x = cos(u) (2 + cos(v))
y = sin(u) (2 + cos(v))
z = x
^{2}
- y
^{2}
+ 2 x y tan
^{2}
(v)
-pi <= u <= pi, -pi <= v <= pi