Journal of Combinatorial Theory, Series A, Volume 56

Volume 56, Number 1, January 1991

• Manfred Droste, Dugald Macpherson:
  On k-homogeneous posets and graphs. 1-15
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• Salvatore Milici:
  Indecomposable S₆(2, 3, v)'s. 16-26
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• Michelle L. Wachs, Dennis White:
  p, q-Stirling numbers and set partition statistics. 27-46
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• Béla Bollobás, Imre Leader:
  Compressions and isoperimetric inequalities. 47-62
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• Béla Bollobás, Imre Leader:
  Isoperimetric inequalities and fractional set systems. 63-74
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• Gerhard Keller:
  Circular codes, loop counting, and zeta-functions. 75-83
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• Heikki Hämäläinen, Seppo Rankinen:
  Upper bounds for football pool problems and mixed covering codes. 84-95
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• Jurek Czyzowicz:
  Lattice diagrams with few slopes. 96-108
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• Anthony J. W. Hilton, Christopher A. Rodger:
  The embedding of partial triple systems when 4 divides lambda. 109-137
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• David G. Wagner:
  The partition polynomial of a finite set system. 138-159
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• Amitai Regev:
  A transposition factorization of walk-permutations in graphs. 160-165
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• M. A. Wertheimer:
  A double affine plane of order 6. 166-171
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Volume 56, Number 2, March 1991

• J. Thévenaz, P. J. Webb:
  Homotopy equivalence of posets with a group action. 173-181
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• Peter Frankl, Zoltán Füredi:
  Beyond the Erdös-Ko-Rado theorem. 182-194
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• Joseph E. Bonin, Kenneth P. Bogart:
  A geometric characterization of dowling lattices. 195-202
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• Günter M. Ziegler:
  Posets with maximal Möbius function. 203-222
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• Robert Beals, Joseph A. Gallian, Patrick Headley, Douglas S. Jungreis:
  Harmonious groups. 223-238
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• Andrew Granville, Alan Hartman:
  Subdesigns in Steiner quadruple systems. 239-270
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• Norman L. Johnson, Rolando Pomareda, F. W. Wilke:
  j-Planes. 271-284
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• Ron Brown:
  Minimal covers of S_n by abelian subgroups and maximal subsets of pairwise noncommuting elements, II. 285-289
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• Peter C. Fishburn:
  A note on linear extensions and incomparable pairs. 290-296
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• Jennifer D. Key, Kirsten Mackenzie:
  An upper bound for the p-rank of a translation plane. 297-302
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• Joseph A. Thas:
  Maximal exterior sets of hyperbolic quadrics: The complete classification. 303-308
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• John Greene:
  On a conjecture of krammer. 309-311
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• Herbert Edelsbrunner, Péter Hajnal:
  A lower bound on the number of unit distances between the vertices of a convex polygon. 312-316
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