A Polyhedron topologically equivalent to a Torus discovered in the late 1940s. It has 7 Vertices, 14 faces, and 21 Edges, and is the Dual Polyhedron of the Szilassi Polyhedron. Its Skeleton is Isomorphic to the Complete Graph .
See also Szilassi Polyhedron, Toroidal Polyhedron
References
Császár, Á. ``A Polyhedron without Diagonals.'' Acta Sci. Math. 13, 140-142, 1949-1950.
Gardner, M. ``The Császár Polyhedron.'' Ch. 11 in Time Travel and Other Mathematical Bewilderments.
New York: W. H. Freeman, 1988.
Gardner, M. Fractal Music, Hypercards, and More: Mathematical Recreations from Scientific American Magazine.
New York: W. H. Freeman, pp. 118-120, 1992.
Hart, G. ``Toroidal Polyhedra.''
http://www.li.net/~george/virtual-polyhedra/toroidal.html.