The rotation Vector of the Trihedron of a curve with Curvature when a point moves
along a curve with unit Speed. It is given by

(1) |

(2) | |||

(3) | |||

(4) |

**References**

Gray, A. *Modern Differential Geometry of Curves and Surfaces.* Boca Raton, FL: CRC Press,
p. 151, 1993.

© 1996-9

1999-05-24