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Integral Cayley Numbers
Wythoffs Construction for Uniform Polytopes
The Classification of Zonohedra by Means of Projective Diagrams
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2-regular 3-space arcsec blue nodes bound cells centers collinear points configuration conic consists convex coordinates corresponding cosh cube cyclically permutes decagon denote density derived dihedral angle dimensions Dirichlet region dodecahedron dots duads edges elements elliptic Euclidean space faces finite formula four four-dimensional fundamental region group of order H. S. M. Coxeter Hence hexagons hexastigm horosphere hyperbolic space hyperplanes infinite infinity integral Cayley numbers intersection joined lattice Levi graph London Math Mobius's non-Euclidean notation null obtain packing pairs of opposite parallelohedron perpendicular Petrie polygon polar polyhedra polyhedron prism Proc projective geometry quadrangle quadric real projective plane reciprocal red nodes reflections regular map regular polytopes represent rhombic ringed Schlafli sides simplex sinh skew spacelike spherical square symbol symmetric group symmetry synthemes tangent tanh tessellation tetrahedron timelike triangle twelve vectors vertex figure vertices Voronoi world lines zero zonohedron