1. Guest Editors' Foreword

   • Gil Kalai
   • Victor Klee

   Pages: 149 - 150

2. Covering Squares with Squares

   • H. L. Abbott
   • M. Katchalski

   Pages: 151 - 170

3. On the Helly Number for Hyperplane Transversals to Unit Balls

   • B. Aronov
   • J. E. Goodman
   • R. Wenger

   Pages: 171 - 176

4. Oriented Matroid Rigidity of Multiplices

   • T. Bisztriczky
   • K. Böröczky

   Pages: 177 - 184

5. Face Numbers of Scarf Complexes

   • A. Björner

   Pages: 185 - 196

6. On the Generation of Oriented Matroids

   • J. Bokowski
   • A. Guedes de Oliveira

   Pages: 197 - 208

7. Cardinalities of Primitive Fixing Systems for Convex Bodies

   • V. Boltyanski
   • E. Morales Amaya

   Pages: 209 - 218

8. Finding Optimal Shadows of Polytopes

   • T. Burger
   • P. Gritzmann

   Pages: 219 - 240

9. Realizations of Regular Abstract Polyhedra of Types {3,6} and {6,3}

   • H. Burgiel
   • D. Stanton

   Pages: 241 - 256

10. On the Cocircuit Graph of an Oriented Matroid

    • R. Cordovil
    • K. Fukuda
    • A. Guedes de Oliveira

    Pages: 257 - 266

11. The Blocking Numbers of Convex Bodies

    • L. Dalla
    • D. G. Larman
    • C. Zong

    Pages: 267 - 278

12. 4-Regular Vertex-Transitive Tilings of E ³

    • O. Delgado Friedrichs
    • D. H. Huson

    Pages: 279 - 292

13. Some Properties of Graphs of Diameters

    • V. L. Dol'nikov

    Pages: 293 - 300

14. Stability Theorems for Two Measures of Symmetry

    • H. Groemer

    Pages: 301 - 312

15. Ubiquitous Angles in Equiangular Sets of Lines

    • B. Guiduli
    • M. Rosenfeld

    Pages: 313 - 324

16. Neighborly Cubical Polytopes

    • M. Joswig
    • G. M. Ziegler

    Pages: 325 - 344

17. Transversals for Families of Translates of a Two-Dimensional Convex Compact Set

    • R. N. Karasev

    Pages: 345 - 354

18. Hadwiger—Wills-Type Higher-Dimensional Generalizations of Pick's Theorem

    • K. Kolodziejczyk

    Pages: 355 - 364

19. Mutation Polynomials and Oriented Matroids

    • J. Lawrence

    Pages: 365 - 390

20. Kalai's Squeezed Spheres Are Shellable

    • C. W. Lee

    Pages: 391 - 396

21. Simplices with Equiareal Faces

    • P. McMullen

    Pages: 397 - 412

22. Three Theorems, with Computer-Aided Proofs, on Three-Dimensional Faces and Quotients of Polytopes

    • G. Meisinger
    • P. Kleinschmidt
    • G. Kalai

    Pages: 413 - 420

23. Convex and Linear Orientations of Polytopal Graphs

    • J. Mihalisin
    • V. Klee

    Pages: 421 - 436

24. Icosahedra Constructed from Congruent Triangles

    • E. N. Miller

    Pages: 437 - 452

25. Realizations of Regular Toroidal Maps of Type {4,4}

    • B. Monson
    • A. I. Weiss

    Pages: 453 - 466

26. A Double Tiling of Triangles and Regular Hexagons

    • H. Okumura
    • J. F. Rigby

    Pages: 467 - 480

27. Cutting Glass

    • J. Pach
    • G. Tardos

    Pages: 481 - 496

28. Hamiltonian Cycles in T-Graphs

    • J. R. Reay
    • T. Zamfirescu

    Pages: 497 - 502

29. Finding Small Triangulations of Polytope Boundaries Is Hard

    • J. Richter-Gebert

    Pages: 503 - 518

30. Unilateral and Equitransitive Tilings by Squares

    • D. Schattschneider

    Pages: 519 - 526

31. Mixed Functionals of Convex Bodies

    • R. Schneider

    Pages: 527 - 538

32. Densest Packings of More than Three d -Spheres Are Nonplanar

    • U. Schnell
    • J. M. Wills

    Pages: 539 - 550

33. Cyclic Product Theorems for Polygons (I) Constructions using Circles

    • G. C. Shephard

    Pages: 551 - 571