Journal of Combinatorial Theory, Series A, Volume 54

Volume 54, Number 1, May 1990

• Wojciech Guzicki:
  Ulam's searching game with two lies. 1-19
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• Esther R. Lamken, Scott A. Vanstone:
  The existence of skew Howell designs of side 2n and order 2n + 2. 20-40
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• Dennis Stanton:
  Unimodality and Young's lattice. 41-53
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• Lynne M. Butler:
  The q-log-concavity of q-binomial coefficients. 54-63
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• Pierre Leroux:
  Reduced matrices and q-log-concavity properties of q-Stirling numbers. 64-84
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• Peter Frankl:
  Intersection theorems and mod p rank of inclusion matrices. 85-94
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• Peter Frankl, Ronald L. Graham, Vojtech Rödl:
  Iterated combinatorial density theorems. 95-111
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• Robert L. McFarland:
  Sub-difference sets of Hadamard difference sets. 112-122
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• István Beck:
  An inequality for partially ordered sets. 123-128
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• A. Robert Calderbank:
  Covering radius and the chromatic number of Kneser graphs. 129-131
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• Richard A. Brualdi, Bryan L. Shader:
  Matrix factorizations of determinants and permanents. 132-134
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• Bruce N. Cooperstein:
  A sporadic ovoid in Omega⁺(8, 5) and some non-desarguesian translation planes of order 25. 135-140
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• Shalosh B. Ekhad:
  A very short proof of Dixon's theorem. 141-142
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• G. Kolesova, C. W. H. Lam, L. Thiel:
  On the number of 8×8 latin squares. 143-148
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Volume 54, Number 2, July 1990

• Ljubo Marangunic:
  Biplanes (56, 11, 2) with involutory collineation fixing 6 points. 149-163
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• Eiichi Bannai, Shen Hao, Sung-Yell Song:
  Character tables of the association schemes of finite orthogonal groups acting on the nonisotropic points. 164-200
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• Arnold Neumaier:
  Krein conditions and near polygons. 201-209
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• Walter Wenzel:
  Algebraic relations between matroids connected by weak homomorphisms. 210-224
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• Robert A. Proctor:
  Solution of a sperner conjecture of stanley with a construction of gelfand. 225-234
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• Robert A. Proctor:
  Product evaluations of lefschetz determinants for grassmannians and of determinants of multinomial coefficients. 235-247
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• Zoltán Füredi:
  Covering pairs by q² + q + 1 sets. 248-271
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• Ömer Egecioglu, Jeffrey B. Remmel:
  The monomial symmetric functions and the Frobenius map. 272-295
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• Kevin J. Compton, Carlos H. Montenegro:
  The largest set partitioned by a subfamily of a cover. 296-303
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• Maohua Le:
  On Golomb's conjecture. 304-308
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• Shalosh B. Ekhad, Sol Tre:
  A purely verification proof of the first Rogers-Ramanujan identity. 309-311
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• Albrecht Beutelspacher:
  How to communicate efficiently. 312-316
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• Richard Garfield, Donald E. Knuth, Herbert S. Wilf:
  A bijection for ordered factorizations. 317-318
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