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Rodrigues's Curvature Formula


\begin{displaymath}
d\hat{\bf N}+\kappa_i\,d{\bf r}={\bf0},
\end{displaymath}

where $\hat{\bf N}$ is the unit Normal Vector and $\kappa_i$ is one of the two Principal Curvatures.

See also Normal Vector, Principal Curvatures




© 1996-9 Eric W. Weisstein
1999-05-25