## Bour Minimal SurfaceAttributed to Edmond BourEquations by Roger Bagula Graphics by Paul Bourke February 2003 |
x = r^{n-1} cos((n-1) t)/(2 (n-1)) - r^{n+1} cos((n+1) t)/(2 (n+1))
y = r
z = r 0 <= r, 0 <= v <= 2 pi |

n = 3

n = 4

n = 5

n = 6