Journal of Combinatorial Theory, Series B, Volume 26

Volume 26, Number 1, February 1979

• K. Appel, W. Haken:
  An unavoidable set of configurations in planar triangulations. 1-21
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• Maurice Pouzet:
  Relations non reconstructibles par leurs restrictions. 22-34
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• Arthur M. Hobbs:
  Maximal Hamiltonian cycles in squares of graphs. 35-49
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• Arthur M. Hobbs:
  Hamiltonian squares of cacti. 50-65
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• Daniel S. Hirschberg, C. K. Wong:
  Upper and lower bounds for graph-diameter problems with application to record allocation. 66-74
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• George B. Purdy:
  The minimum genus of a two-point universal graph. 75-77
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• Ernest J. Cockayne, Stephen T. Hedetniemi, Peter J. Slater:
  Matchings and transversals in hypergraphs, domination and independence-in trees. 78-80
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• Chang M. Bang, Henry Sharp:
  Score vectors of tournaments. 81-84
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• Ki Hang Kim, Fred W. Roush:
  Words with prescribed adjacencies. 85-97
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• K. R. Parthasarathy, G. Ravindra:
  The validity of the strong perfect-graph conjecture for (K₄-e)-free graphs. 98-100
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• R. W. Deming:
  Acyclic orientations of a graph and chromatic and independence numbers. 101-110
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• E. J. Farrell:
  On a general class of graph polynomials. 111-122
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Volume 26, Number 2, April 1979

• James G. Oxley:
  On a packing problem for infinite graphs and independence spaces. 123-130
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• David J. Pengelley, M. Jungerman:
  Index four orientable embeddings and case zero of the Heawood conjecture. 131-144
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• M. O'Keefe, Pak-Ken Wong:
  A smallest graph of girth 5 and valency 6. 145-149
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• Jean-Luc Paillet:
  A threshold property for intersections in a finite set. 150-153
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• M. Jungerman:
  The nonorientable genus of the symmetric quadripartite graph. 154-158
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• Paul D. Seymour:
  Matroid representation over GF(3). 159-173
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• Robert E. Bixby:
  On Reid's characterization of the ternary matroids. 174-204
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• F. Jaeger:
  Flows and generalized coloring theorems in graphs. 205-216
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• Nguyen Huy Xuong:
  How to determine the maximum genus of a graph. 217-225
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• Nguyen Huy Xuong:
  Upper-embeddable graphs and related topics. 226-232
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• Serge Hocquenghem:
  Tabloïdes. 233-250
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• Walter Whiteley:
  Logic and invariant theory IV. Invariants and syzygies in combinatorial geometry. 251-267
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• Paul A. Catlin:
  Hajós' graph-coloring conjecture: Variations and counterexamples. 268-274
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Volume 26, Number 3, June 1979

• Gyula O. H. Katona:
  Obituary. 275
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• Zsolt Baranyai:
  The edge-coloring of complete hypergraphs I. 276-294
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• Shawpawn Kumar Das:
  A Euler-Poincaré characteristic for the open set lattices of finite topologies. 295-299
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• Dragomir Z. Djokovic:
  On regular graphs, V. 300-308
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• Dragomir Z. Djokovic:
  On regular graphs, VI. 309-316
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• Jean A. Larson:
  Some graphs with chromatic number three. 317-322
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• Wilfried Imrich:
  On the connectivity of cayley graphs. 323-326
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• D. Kim, I. G. Enting:
  The limit of chromatic polynomials. 327-336
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• R. J. Cook:
  Vertex degrees of planar graphs. 337-345
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• F. Göbel, A. A. Jagers:
  On a conjecture of Tutte concerning minimal tree numbers. 346-348
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• Alexander Schrijver:
  Matroids and linking systems. 349-369
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• Paul D. Seymour:
  A short proof of the two-commodity flow theorem. 370-371
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• A. J. W. Duijvestijn:
  A lowest order simple perfect 2 × 1 squared rectangle. 372-374
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