Combinatorics '90Recent Trends and Applications, Proceedings of the Conference on Corn binatorics, Gaeta

Description

This volume forms a valuable source of information on recent developments in research in combinatorics, with special regard to the geometric point of view. Topics covered include: finite geometries (arcs, caps, special varieties in a Galois space; generalized quadrangles; Benz planes; foundation of geometry), partial geometries, Buekenhout geometries, transitive permutation sets, flat-transitive geometries, design theory, finite groups, near-rings and semifields, MV-algebras, coding theory, cryptography and graph theory in its geometric and design aspects. Content: Advisory Editors Page ii Edited by Page iii Copyright page Page iv Foreword Page v Adriano Barlotti, Pier Vittorio Ceccherini, Alessandro Bichara, Giuseppe Talliini Irregular assignments and vertex-distinguishing edge-colorings of graphs Original Research Article Pages 1-9 M. Aigner, E. Triesch, Z. Tuza Construction of non-isomorphic regular tournaments Original Research Article Pages 11-23 A. Astié-Vidal, V. Dugat, Z. Tuza On Structures T(t, q, r, n) Original Research Article Pages 25-36 Walter Benz A Tactical Decomposition for Incidence Structures Original Research Article Pages 37-43 Diter Betten, Mathlas Braun Note on a Characterization of Segre Variety in PG(r, q) Original Research Article Pages 45-47 Alessandro Bichara, Stefano Innamorati A property of sharply 3–transitive finite permutation sets Original Research Article Pages 49-60 A. Bonisoli, G. Korchmáros Faithful orbits in symmetric designs Original Research Article Pages 61-68 Andrew Bowler Minimal Flagtransitive Geometries Pages 69-70 Francis Buekenhout Some Results on Hyperarchimedean MV-Algebras Original Research Article Pages 71-79 V. Cavaccini, A. Lettieri Three Combinatorial Sequences Derivable from the Lattice Path Counting Original Research Article Pages 81-92 Wenchang Chu Compound Closed Chains in Circular Planar Nearrings Original Research Article Pages 93-106 James R. Clay p-primitive semifield planes Original Research Article Pages 107-117 M. Cordero The Fractal-like Steiner Triple System Original Research Article Pages 119-126 Marialuisa J. de Resmini Locally partial geometries with different types of residues Original Research Article Pages 127-138 A. Del Fra, D. Ghinelli, A. Pasini (0,n)-Sets in a generalized quadrangle Original Research Article Pages 139-157 A. Del Fra, D. Ghinelli, S.E. Payne Combinatorics and Cryptography Original Research Article Pages 159-174 Franco Eugeni Recent intrinsic characterizations of ovoids and elliptic quadrics in PG(3,K) Original Research Article Pages 175-190 Giorgio Faina A Natural Association of PGL(V)-Orbits in the Segre Variety (P(V)m with Flags and Young Tableaux Original Research Article Pages 191-214 Federico Gaeta Decomposing Steiner Triple Systems Into Four-Line Configurations Original Research Article Pages 215-226 T.S. Griggs, M.J. de Resmini, A. Rosa Non-symmetric configurations with deficiencies 1 and 2 Original Research Article Pages 227-239 H. Gropp Characterizing Linear Spaces by Blocking Sets Original Research Article Pages 241-248 Erika Hahn Partial Geometries of Rank n Original Research Article Pages 249-258 Daniel R. Hughes The minimal parabolic geometry of the Conway group Co1 is simply connected Original Research Article Pages 259-273 A.A. Ivanov Coset Enumeration in Groups and Constructions of Symmetric Designs Original Research Article Pages 275-277 Zvonimir Janko On the Ubiquity of Denniston-Type Translation Ovals in Generalized André Planes Original Research Article Pages 279-296 V. Jha, N.L. Johnson Translation Planes and Related Combinatorial Structures Original Research Article Pages 297-315 Norman L. Johnson Finite Reflection Groups and their Corresponding Structures Original Research Article Pages 317-336 Helmut Karzel On Nonisomorphic BIBD with Identical Parameters Original Research Article Pages 337-346 Wen-Fong Ke Incidence loops and their geometry Original Research Article Pages 347-364 Mario Marchi Families of Menon Difference Sets Original Research Article Pages 365-380 D.B. Meisner On the characterization problem for finite linear spaces Original Research Article Pages 381-390 N. Melone Linear spaces in which every line of maximal degree meets only few lines Original Research Article Pages 391-402 Klaus Metsch Flag-Transitive Buekenhout Geometries Original Research Article Pages 403-447 Antonio Pasini, Satoshi Yoshiara Collineations of the generalized quadrangles associated with q-clans Original Research Article Pages 449-461 S.E. Payne Projective embedding of fibered groups and the Suzuki groups Original Research Article Pages 463-469 S. Pianta Codes, block designs, Frobenius groups, and near-rings Original Research Article Pages 471-476 G.F. Pilz The flag-transitive affine planes of order 27 Original Research Article Pages 477-500 Alan R. Prince Symmetric Functions and Bijective Identities Original Research Article Pages 501-509 Domenico Senato, Antonietta Venezia On the Existence of Nearly Kirkman Systems Original Research Article Pages 511-518 Hao Shen Codes and semilinear spaces Original Research Article Pages 519-528 J. Simonis Old and new results on spreads and ovoids of finite classical polar spaces Original Research Article Pages 529-544 J.A. Thas Large partial parallel classes in Steiner systems Original Research Article Pages 545-548 Zs. Tuza Minimal Line Distinguishing Colourings in Graphs Original Research Article Pages 549-558 B.J. Wilson Some Results on −1 Multiplier of Difference Lists Original Research Article Pages 559-566 Qing Xiang