Journal of Combinatorial Theory, Series A, Volume 55
Volume 55, Number 1, September 1990
- Soichi Okada: Wreath products by the symmetric groups and product posets of Young's lattices. 14-32
- Zbigniew Lonc: Solution of a delta-system decomposition problem. 33-48
- Shalom Eliahou, Michel Kervaire, Bahman Saffari: A new restriction on the lengths of golay complementary sequences. 49-59
- Asia Ivic Weiss: Some infinite families of finite incidence-polytopes. 60-73
- Nicolas Percsy: On the geometry of Zara graphs. 74-79
- Hélène Barcelo, Nantel Bergeron: The Orlik-Solomon algebra on the partition lattice and the free Lie algebra. 80-92
- Hélène Barcelo: On the action of the symmetric group on the Free Lie Algebra and the partition lattice. 93-129
- Aiden A. Bruen: Nuclei of sets of q + 1 points in PG(2, q) and blocking sets of Redei type. 130-132
- Christiane Lefevre-Percsy: Infinite (Af, Af*)-geometries. 133-139
- C. Ohn: Notes on dimensional closure spaces. 140-142
- James F. Lynch: Taxonomic classes of sets. 143-152
- Steven Skiena: Counting k-projections of a point set. 153-160
Volume 55, Number 2, November 1990
- Joel H. Spencer: Counting extensions. 247-255
- Boris Pittel, H. Rubin: How many random questions are necessary to identify n distinct objects? 292-312
- Alexander Pott: An affine analogue of Wilbrink's theorem. 313-315
- Zoltán Füredi: The maximum number of unit distances in a convex n-gon. 316-320
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