## Helicoid Minimal SurfaceWritten by Paul BourkeDecember 2000 |
x = c v cos(u) y = c v sin(u) z = u
-infinity <= u <= infinity |

The helicoid was first documented by J. Meusnier around 1775, it was the first unbounded non-periodic minimal surface to be found. In addition, besides the plane it is the only known ruled minimal surface (zero mean curvature).