Preface
1 The Functions of Schläfli and Lobatschefsky
2 Integral Cayley Numbers
3 Wythoff's Construction for Uniform Polytopes
4 The Classification of Zonohedra by Means of Projective Diagrams
5 "Regular Skew polyhedra in Three and Four Dimensions, and Their Topological Analogues "
6 Self-dual Configurations and Regular Graphs
7 "Twelve Points in PG(5, 3) with 95040 Self-transformations "
8 Arrangements of Equal Spheres in Non-Euclidean Spaces
9 An Upper Bound for the Number of Equal Nonoverlapping Spheres That Can Touch Another of the Same Size
10 Regular Honeycombs in Hyperbolic Space
11 Reflected Light Signals
12 Geometry
Index