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

Volume 54, Number 2, July 1990

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