The point on the Positive Ray of the Normal Vector at a distance , where is the Radius
of Curvature. It is given by

(1) |

(2) |

(3) | |||

(4) |

**References**

Gray, A. *Modern Differential Geometry of Curves and Surfaces.* Boca Raton, FL: CRC Press, 1993.

© 1996-9

1999-05-25