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Figure 4.5 (a) Beginning of a path through color voxel space. (b) End of a path through
color voxel space. Derived from Netscape 7.2. Source: Arlinghaus, S. L. and W. C.
Arlinghaus. 1999. Animaps III: Color Straws, Color Voxels, and Color Ramps. Solstice:
An Electronic Journal of Geography and Mathematics. Volume X. No. 1. Ann Arbor:
Institute of Mathematical Geography. Source of base image: Netscape software.
http://www-personal.umich.edu/%7Ecopyrght/image/solstice/sum99/animaps3.html.
We shall revisit the ideas embodied in this theorem in the last chapter of this
work when we look briefly at routing problems and path-finding. The deeper
related mathematical questions center on adjacency, graph theory, and topol-
ogy. Follow the link to the four-color theorem at the end of this chapter; think
about issues associated with map coloring in terms of adjacency of colored
units on different surfaces (as noted earlier in this chapter).
Further, one might wonder what would happen with color in higher dimen-
sions. In a related but not identical manner, the RGB scheme may also be
 
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