Journal of Combinatorial Theory, Series A, Volume 90

Volume 90, Number 1, April 2000

• Sergei L. Bezrukov, Robert Elsässer:
  The Spider Poset Is Macaulay. 1-26
  
• Mitsugu Hirasaka:
  Primitive Commutative Association Schemes with a Non-symmetric Relation of Valency 3. 27-48
  
• Sheldon L. Degenhardt, Stephen C. Milne:
  Weighted-Inversion Statistics and Their Symmetry Groups. 49-103
  
• Phillip McClurg:
  On the Universal Embedding of Dual Polar Spaces of Type Sp_2n(2). 104-122
  
• Jonathan David Farley:
  Quasi-Differential Posets and Cover Functions of Distributive Lattices: I. A Conjecture of Stanley. 123-147
  
• Guglielmo Lunardon, Olga Polverino:
  Blocking Sets of Size q^t+q^t-1+1. 148-158
  
• Joseph A. Thas, Hendrik Van Maldeghem:
  Classification of Embeddings of the Flag Geometries of Projective Planes in Finite Projective Spaces, Part 1. 159-172
  
• Joseph A. Thas, Hendrik Van Maldeghem:
  Classification of Embeddings of the Flag Geometries of Projective Planes in Finite Projective Spaces, Part 3. 173-196
  
• Matt DeVos:
  Matrix Choosability. 197-209
  
• Emeric Deutsch:
  A Bijection on Ordered Trees and Its Consequences. 210-215
  
• Astrid Reifegerste:
  On an Involution Concerning Pairs of Polynomials over _F2. 216-220
  
• Kiran S. Kedlaya:
  Another Combinatorial Determinant. 221-223
  
• Douglas R. Stinson, Ruizhong Wei, Lie Zhu:
  Some New Bounds for Cover-Free Families. 224-234
  
• Hiroshi Maehara, Ai Oshiro:
  Cutting a Set of Disks by a Line with Leaving Many Intact Disks in Both Sides. 235-240
  

Volume 90, Number 2, May 2000

• Joseph A. Thas, Hendrik Van Maldeghem:
  Classification of Embeddings of the Flag Geometries of Projective Planes in Finite Projective Spaces, Part 2. 241-256
  
• Rolf S. Rees:
  Truncated Transversal Designs: A New Lower Bound on the Number of Idempotent MOLS of Side n. 257-266
  
• Bernadette Krawczyk, Roland Speicher:
  Combinatorics of Free Cumulants. 267-292
  
• Miklós Bóna, Richard Ehrenborg:
  Combinatorial Proof of the Log-Concavity of the Numbers of Permutations with k Runs. 293-303
  
• Sven Reichard:
  A Criterion for the t-Vertex Condition of Graphs. 304-314
  
• Marco Buratti:
  Existence of Z-Cyclic Triplewhist Tournaments for a Prime Number of Players. 315-325
  
• János Pach, Rom Pinchasi:
  Bichromatic Lines with Few Points. 326-335
  
• Deryk Osthus:
  Maximum Antichains in Random Subsets of a Finite Set. 336-346
  
• Beifang Chen:
  On Characteristic Polynomials of Subspace Arrangements. 347-352
  
• Marco Buratti:
  Two New Classes of Difference Families. 353-355