1. A Note on Blockers in Posets

   • Anders Björner
   • Axel Hultman

   Original Paper Pages: 123 - 131

2. A Distance-2-Spread of the Generalized Hexagon H(3)

   • A. De Wispelaere
   • H. Van Meldeghem

   Original Paper Pages: 133 - 154

3. A Unified Construction of Two-Dimensional Pooling Designs

   • Tung-shan Fu
   • Kwun-Shen Lin

   Original Paper Pages: 155 - 159

4. Combinatorics of Nilpotents in Symmetric Inverse Semigroups

   • Olexandr Ganyushkin
   • Volodymyr Mazorchuk

   Original Paper Pages: 161 - 175

5. A Characterization of the Simply-Laced FC-Finite Coxeter Groups

   • Manabu Hagiwara
   • Masao Ishikawa
   • Hiroyuki Tagawa

   Original Paper Pages: 177 - 196

6. Order Ideals in Weak Subposets of Young’s Lattice and Associated Unimodality Conjectures

   • L. Lapointe
   • J. Morse

   Original Paper Pages: 197 - 219

7. On the Escape Probability for a Left or Right Continuous Random Walk

   • M.P. Quine

   Original Paper Pages: 221 - 223

8. On Fraenkel’s N-Heap Wythoff’s Conjectures

   • Xinyu Sun
   • Doron Zeilberger

   Original Paper Pages: 225 - 238

9. On the Numbers of Orbits of Permutations under an Operator Related to Eulerian Numbers

   • Shinji Tanimoto

   Original Paper Pages: 239 - 250