Discrete Mathematics, Volume 31

Volume 31, Number 1, 1980

• Kenneth P. Bogart:
  Incidence codes of posets: Eulerian posets and Reed-Muller codes. 1-7
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• Nachum Dershowitz, Shmuel Zaks:
  Enumerations of ordered trees. 9-28
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• J. T. Joichi, Dennis E. White:
  Gray codes in graphs of subsets. 29-41
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• T. D. Parsons, Tomaz Pisanski, Brad Jackson:
  Dual imbeddings and wrapped quasi-coverings of graphs. 43-52
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• George B. Purdy, John E. Wetzel:
  Two-coloring inequalities for Euclidean arrangements in general position. 53-58
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• David W. Walkup:
  Matchings in random regular bipartite digraphs. 59-64
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• Doron Zeilberger:
  Partial difference equations in m₁>=m₂>= ... >=m_n>=0 and their applications to combinatorics. 65-77
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• Tor Bu:
  Partitions of a vector space. 79-83
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• M. L. Gardner:
  Forbidden configurations in intersection graphs of r-graphs. 85-88
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• Yahya Ould Hamidoune:
  On the decomposition of a minimally strongly h-connected digraph into h+1 acircuitic sub-graphs. 89-90
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• S. P. Mohanty:
  Shortest string containing all permutations. 91-95
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• Man-Keung Siu, Po Tong:
  Generation of some de Bruijn sequences. 97-100
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• Anders Björner:
  Some matroid inequalities. 101-103
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• Yahya Ould Hamidoune:
  A property of a-fragments of a digraph. 105-106
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• Denis Naddef, Najiba Sbihi, Maurice Tchuente:
  Independence systems with continuous cardinality of bases. 107-109
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• L. Zhu:
  A pair of orthogonal Steiner systems S(3, 5, 17). 111-113
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Volume 31, Number 2, 1980

• Amos Altshuler, Jürgen Bokowski, Leon Steinberg:
  The classification of simplicial 3-spheres with nine vertices into polytopes and nonpolytopes. 115-124
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• Lars Døvling Andersen, Anthony J. W. Hilton:
  Generalized Latin rectangles I: Construction and decomposition. 125-152
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• Lowell W. Beineke, Richard D. Ringeisen, Joseph Straight:
  The cochromatic index of a graph. 153-159
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• Tom Brylawski, James Oxley:
  Several identities for the characteristic polynomial of a combinatorial geometry. 161-170
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• Paul H. Edelman:
  Chain enumeration and non-crossing partitions. 171-180
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• J. D. Henstridge, Cheryl E. Praeger:
  Note on primitive permutation groups and a diophantine equation. 181-183
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• R. H. Johnson:
  Properties of unique realizations - a survey. 185-192
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• Kevin T. Phelps:
  Automorphism free latin square graphs. 193-200
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• Michael D. Plummer:
  On n-extendable graphs. 201-210
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• Hans S. Witsenhausen:
  On intersections of interval graphs. 211-216
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• Marie-Claude Heydemann:
  On cycles and paths in digraphs. 217-219
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• Manfred Schulz:
  An example of a cubic graph with two orbits and simple eigenvalue sqrt(3). 221-222
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Volume 31, Number 3, 1980

• Michael O. Albertson, David M. Berman:
  Critical graphs for chromatic difference sequences. 225-233
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• Lars Døvling Andersen, Anthony J. W. Hilton:
  Generalized latin rectangles II: Embedding. 235-260
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• Marilena Barnabei, Andrea Brini:
  Some properties of characteristic polynomials and applications to T-lattices. 261-270
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• G. Cohen, P. Frankl:
  On tilings of the binary vector space. 271-277
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• K. M. Koh, D. G. Rogers, T. Tan:
  Products of graceful trees. 279-292
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• Günther Malle:
  Edge orientations on cubic graphs with a maximum number of pairs of oppositely oriented edges. 293-296
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• Stephen B. Maurer, I. Rabinovitch, William T. Trotter:
  Large minimal realizers of a partial order II. 297-313
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• Carsten Thomassen:
  On the number of Hamiltonian cycles in tournaments. 315-323
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• Rudolf Halin:
  A note on infinite triangulated graphs. 325-326
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• Michel Las Vergnas:
  Fundamental circuits and a characterization of binary matroids. 327
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• J.-C. Fournier:
  Demonstration simple du theoreme de Kuratowski et de sa forme duale. 329-332
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• Douglas R. Stinson:
  A skew room square of order 129. 333-335
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• Jacques Wolfmann:
  A new construction of the binary golay code (24, 12, 8) using a group algebra over a finite field. 337-338
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