1. A Characterization of Twin Buildings by Twin Apartments

   • Peter Abramenko
   • Mark Ronan

   OriginalPaper Pages: 1 - 9

2. A New Family of Partial Geometries

   • Rudolf Mathon

   OriginalPaper Pages: 11 - 19

3. An Algebraic Invariant for Substitution Tiling Systems

   • Charles Radin
   • Lorenzo Sadun

   OriginalPaper Pages: 21 - 37

4. Volume Comparison Theorems for Lorentzian Manifolds

   • Paul E. Ehrlich
   • Yoon-Tae Jung
   • Seon-Bu Kim

   OriginalPaper Pages: 39 - 56

5. Inequalities for Volumes of Simplices in Terms of Their Faces

   • Vladimir Volenec
   • Darko Veljan
   • Josip Pečarić

   OriginalPaper Pages: 57 - 62

6. The Weight Enumerator of the Code of the Projective Plane of Order 5

   • Gary McGuire
   • Harold N. Ward

   OriginalPaper Pages: 63 - 77

7. An Extension of Feuerbach's and Luchterhand's Volume Relation

   • Robert J. Gregorac

   OriginalPaper Pages: 79 - 84

8. Presentations for Certain Chevalley Groups

   • F. G. Timmesfeld

   OriginalPaper Pages: 85 - 117