Includes bibliographical references.

On ectors and symmetry ; Combinatorial aspects of the Poincare polynomial associated with a reflection group ; Partial unimodality for ectors of simplicial polytopes and spheres ; Polyominoes and polygons ; Logconcave and unimodal sequences in algebra, combinatorics, and geometry: an update ; A fine classification of closed planar sets according to their nonseeing property ; On the skeleton of the dual cut polytope ; A highschool algebra, "formal calculus", proof of the Bieberbach conjecture [after L. Weinstein] ; Node firing games on graphs ; Combinatorial presentation of the structure constants of the center of the group algebra of mathfrak S_n ; Abstract rigidity in pace ; A meshing technique for de Bruijn tori ; A structural decomposition for hypergraphs ; Hypercube embedding of distances with few values ; On Borsuk's problem ; Zonotopal tilings and the BohneDress theorem ; Plane trees and algebraic numbers ; Applications of the Hopf trace formula to computing homology representations ; Stabbing oriented convex polygons in randomized (n^2) time ; On the finitization of Eckhoff's conjecture ; New cases of the colored Tverberg theorem ; Shellability in the lattice of subgroups of a finite group Ron M Adin ; Helene Barcelo and Alain Goupil ; Anders Bjorner ; Mireille BousquetMelou ; Francesco Brenti ; Ziva Deutsch ; Antoine Deza and Michel Deza ; Shalosh B Ekhad and Doron Zeilberger ; Kimmo Eriksson ; Alain Goupil ; Jack E Graver Brigitte Servatius and Herman Servatius ; Glenn Hurlbert and Garth Isaak ; Peter Jeavons David Cohen and Marc Gyssens ; M Laurent ; A Nilli ; Jurgen RichterGebert and Gunter M Ziegler ; George Shabat and Alexander Zvonkin ; Sheila Sundaram ; Seth Teller and Michael Hohmeyer ; Helge Tverberg ; Sinisa T Vrecica and Rade T Zivaljevic ; Volkmar Welker