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Tangent to a quadric

Similar to equation (2.13), the tangent plane ${\tt\Pi }$ to a quadric ${\bf Q}$ through a point ${\tt M}$ of the quadric is obtained as
\begin{displaymath} {\tt\Pi}= {\bf Q} {\tt M} \enspace . \end{displaymath} (B18)


Marc Pollefeys 2000-07-12