A Minimal Surface which resembles a Cross-Cap. It is given by the polar equations

(1) | |||

(2) | |||

(3) |

or the parametric equations

(4) | |||

(5) | |||

(6) |

**References**

Maeder, R. *Programming in Mathematica, 3rd ed.* Reading, MA: Addison-Wesley, pp. 29-30, 1997.

© 1996-9

1999-05-26