Polyhedra with 8 Faces and 6-8 Vertices

Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay


These are Schlegel Nets; that is, one face (usually the one with the most edges) has been selected as a base and the polyhedron flattened into a plane within the enclosing polygon. In graph theory, the exterior of the polygon is considered the face. To help with identifying faces, they are color-coded as follows:

Also, we are only concerned with topologically distinct polyhedra, that is, differing in number or type of faces and vertices. Thus, a triangular prism and a tetrahedron with one vertex truncated are topologically equivalent 5-hedra, a cube and rhombohedron are topologically equivalent 6-hedra, and so on. Some polyhedra, for example those with two pentagon faces, are inherently ambiguous, because the net will be different depending on which pentagon is considered the base. Those cases can be sorted out by drawing auxiliary diagrams with both pentagons folded flat and regarded as the base. In a number of cases, equivalent polyhedra are shown enclosed in gray and linked with an equals sign, for the benefit of readers who may think they have discovered an unlisted case.

The original listing was compared with the output from the graph-listing program plantri.exe, and about 15 errors were found, either omissions or duplications. These have been corrected in the present listing.



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Created 23 Sep 1997, Last Update 13 February 2014

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