Next: Signal Processing,
Much of the geometry code in Octave is based on the Qhull
Some of the documentation for Qhull, particularly for the options that
can be passed to delaunay, voronoi and convhull,
etc., is relevant to Octave users.
 Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T.,
The Quickhull Algorithm for Convex Hulls, ACM Trans. on Mathematical
Software, 22(4):469–483, Dec 1996, http://www.qhull.org