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
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• Mitsugu Hirasaka:
  Primitive Commutative Association Schemes with a Non-symmetric Relation of Valency 3. 27-48
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• Sheldon L. Degenhardt, Stephen C. Milne:
  Weighted-Inversion Statistics and Their Symmetry Groups. 49-103
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• Phillip McClurg:
  On the Universal Embedding of Dual Polar Spaces of Type Sp_2n(2). 104-122
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• Jonathan David Farley:
  Quasi-Differential Posets and Cover Functions of Distributive Lattices: I. A Conjecture of Stanley. 123-147
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• Guglielmo Lunardon, Olga Polverino:
  Blocking Sets of Size q^t+q^t-1+1. 148-158
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• Joseph A. Thas, Hendrik Van Maldeghem:
  Classification of Embeddings of the Flag Geometries of Projective Planes in Finite Projective Spaces, Part 1. 159-172
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• Joseph A. Thas, Hendrik Van Maldeghem:
  Classification of Embeddings of the Flag Geometries of Projective Planes in Finite Projective Spaces, Part 3. 173-196
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• Matt DeVos:
  Matrix Choosability. 197-209
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• Emeric Deutsch:
  A Bijection on Ordered Trees and Its Consequences. 210-215
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• Astrid Reifegerste:
  On an Involution Concerning Pairs of Polynomials over _F2. 216-220
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• Kiran S. Kedlaya:
  Another Combinatorial Determinant. 221-223
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• Douglas R. Stinson, Ruizhong Wei, Lie Zhu:
  Some New Bounds for Cover-Free Families. 224-234
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• Hiroshi Maehara, Ai Oshiro:
  Cutting a Set of Disks by a Line with Leaving Many Intact Disks in Both Sides. 235-240
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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
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• Rolf S. Rees:
  Truncated Transversal Designs: A New Lower Bound on the Number of Idempotent MOLS of Side n. 257-266
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• Bernadette Krawczyk, Roland Speicher:
  Combinatorics of Free Cumulants. 267-292
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• Miklós Bóna, Richard Ehrenborg:
  Combinatorial Proof of the Log-Concavity of the Numbers of Permutations with k Runs. 293-303
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• Sven Reichard:
  A Criterion for the t-Vertex Condition of Graphs. 304-314
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• Marco Buratti:
  Existence of Z-Cyclic Triplewhist Tournaments for a Prime Number of Players. 315-325
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• János Pach, Rom Pinchasi:
  Bichromatic Lines with Few Points. 326-335
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• Deryk Osthus:
  Maximum Antichains in Random Subsets of a Finite Set. 336-346
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• Beifang Chen:
  On Characteristic Polynomials of Subspace Arrangements. 347-352
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• Marco Buratti:
  Two New Classes of Difference Families. 353-355
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