## Catalan Minimal SurfaceWritten by Paul BourkeDecember 2000 |
x = c (u - cosh(v) sin(u)) y = c (1 - cosh(v) cos(u>) z = -4 c sin(u/2) sinh(v/2)
-infinity <= u <= infinity |

The catalan minimal surface (zero mean curvature) is attributed to Eugene Catalan around 1855.