Combinatorics '86 : proceedings of the International Conference on Incidence Geometries and Combinatorial Structures, Passo della Mendola, Trento, Italy, 30 June-5 July, 1986 / / edited by A. Barlotti, M. Marchi, G. Tallini

• Pubblicazione: Amsterdam ; ; New York, : North-Holland; New York, N.Y., U.S.A., : Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1988
• Descrizione fisica: 1 online resource (519 p.)
• Disciplina: 516/.12
• Soggetto topico: Combinatorial geometry; Mathematics
• Altri autori: BarlottiA <1923-> (Adriano) MarchiM TalliniG <1930-> (Giuseppe)
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographies.
• Nota di contenuto: Front Cover; Combinatorics '86; Copyright Page; Contens; Foreword; Opening Welcome; Participants; Chapter 1. Net of Rationality in a Minkowski Plane; Chapter 2. A New Class of Translation Planes; Chapter 3. Quasigroups and Groups Arising from Cubic Surfaces; Chapter 4. Blocking Sets in the Large Mathieu Designs, I: The Case; Chapter 5. Blocking Sets in the Projective Plane of Order Four; Chapter 6. Kalahari and the Sequence ""Sloane No. 377""; Chapter 7. Enciphered Geometry. Some Applications of Geometry to Cryptography; Chapter 8. On Finite Grassmann Spaces ; Chapter 9. The Regular Subgroups of the Sharply 3-Transitive Finite Permutation GroupsChapter 10. Hyperovals in Desarguesian Planes of Even Order; Chapter 11. Circular Block Designs from Planar Near-Rings; Chapter 12. Extending the Concept of Decomposability for Triple Systems; Chapter 13. Translation Partial Geometries; Chapter 14. On Admissible Sets with Two Intersection Numbers in a Projective PLane; Chapter 15. Commutative Finite A-Hypergroups of Length Two; Chapter 16. On Sets of Fixed Parity in Steiner Systems; Chapter 17. Blocking Sets of Index Two ; Chapter 18. A Short Proof that Ordered Linear Spaces a r e Locally ProjectiveChapter 19. Midpoints and Midlines in a Finite Hyperbolic Plane; Chapter 20. Hall-Ryser Type Theorems for Relative Difference Sets; Chapter 21. Coordination of Generalized Quadrangles; Chapter 22. Construction of Some Planar Translation Spaces; Chapter 23. Regular Sets in Geometries; Chapter 24. Group Preserving Extensions of Skew Parabola Planes; Chapter 25. Products of Involutions in Orthogonal Groups; Chapter 26. Examples of Ovoidal MBbius Planes of Hering Class II1 ; Chapter 27. A Construction of Pairs and Triples of k-Incomplete Orthogonal ArraysChapter 28. Relative Infinity in Projective De Sitter Spacetime and Its Relation to Proper Time; Chapter 29. Affine Hjelmslev Rings and Planes; Chapter 30. Irreducible Representations of Hecke Algebras of Rank 2 Geometries; Chapter 31. A Characterization of Pappian Affine Hjelmslev Planes; Chapter 32. Embedding Locally Projective Planar Spaces in to Projective Spaces; Chapter 33. On Topological Incidence Groupoids; Chapter 34. Isomorphisms of Finite Hypergroupoids; Chapter 35. Seminversive Planes ; Chapter 36. Geometric and Algebraic Methods in the Classification of Geometries Belonging to Lie DiagramsChapter 37. The Thas-Fisher Generalized Quadrangles; Chapter 38. On Group Spaces Defined by Semidirect Products of Groups; Chapter 39. On Permutation Properties for Finitely Generated Semigroups; Chapter 40. On k-Sets of Type (O,m,n) in Sr,q with Three Exterior Hyperplanes; Chapter 41. An Algorithm for LS -colourations; Chapter 42. A Blocking Set in PG ( 3 , q ) , q >= 5 ; Chapter 43. A Characterization of all Abelian Groups whose Lattice of Precompact Group Topologies Represents a Projective Geometry
• Sommario/riassunto: Recent developments in all aspects of combinatorial and incidence geometry are covered in this volume, including their links with the foundations of geometry, graph theory and algebraic structures, and the applications to coding theory and computer science. Topics covered include Galois geometries, blocking sets, affine and projective planes, incidence structures and their automorphism groups. Matroids, graph theory and designs are also treated, along with weak algebraic structures such as near-rings, near-fields, quasi-groups, loops, hypergroups etc., and permutation sets and groups. The
• Titolo autorizzato: Combinatorics '86
• ISBN: 1-281-79316-7; 9786611793166; 0-08-086777-4
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910827233803321
• Lo trovi qui: Univ. Federico II
• Serie: Annals of discrete mathematics ; ; 37.