Combinatorics '81 (eBook)

In Honour of Beniamino Segre

A. Barlotti, P.V. Ceccherini, G. Tallini (Herausgeber)

eBook Download: PDF

1983 | 1. Auflage
822 Seiten
Elsevier Science (Verlag)
978-0-08-087189-9 (ISBN)

Infos

Combinatorics '81

Inhalt

Front Cover 1
Combinatorics ' 81 in Honour of Beniamino Segre 4
Copyright Page 5
Contents 8
Preface 6
Chapter 1. Address to Participants 14
Chapter 2. Beniamino Segre 18
Chapter 3. Complete arcs in PG (2,q), q even 26
Chapter 4. Intorno ad un teorema di Buekenhout sulle ovali pascaliane 30
Chapter 5. Orthogonality in reflection geometry 42
Chapter 6. On some translation planes admitting a Frobenius group of collineations 50
Chapter 7. Hall triple systems and related topics 68
Chapter 8. On mappings preserving a single Lorentz-Minkowski- distance. I 74
Chapter 9. Designs obtained from affine spaces 90
Chapter 10. On the codes generated by certain divisible designs 100
Chapter 11. On a characterization of the Grassmann spaces associated with an affne space 108
Chapter 12. On a characterization of Grassmann space representing the h-dimensional subspaces in a projective space 126
Chapter 13. Enriched cliques with six vertices 146
Chapter 14. Blocking sets in affine planes 182
Chapter 15. Some building geometries of spherical type as sets of points and lines 190
Chapter 16. “Cyclic” solutions for finite projective planes 194
Chapter 17. Points and lines in metasymplectic spaces 206
Chapter 18. On generalized perfect codes and Steiner systems 210
Chapter 19. Greedy colouring of Steiner triple systems 214
Chapter 20. Concurrence geometries 222
Chapter 21. (q2+q+1)-sets of type (0,1,2,q+1) in translation planes of order q2 238
Chapter 22. The embedding of (0,a)-geometries in PG(n,q). Part I 242
Chapter 23. On cubic surfaces over a field of characteristic 3 254
Chapter 24. Some characterizations of finite 3 -dimensional projective spaces and affine-projective planes 292
Chapter 25. On a problem of A. Kotzig 296
Chapter 26. A small 4-design 304
Chapter 27. Some new generalizations of sharply t -transitive groups and sets 308
Chapter 28. Dissections of polygons 328
Chapter 29. Group modifications of some partial groupoids 332
Chapter 30. Bireflectionality 346
Chapter 31. A graphic characterization of hermitian curves 348
Chapter 32. On the connectivity of maximal planar graphs with minimum degree 5 356
Chapter 33. Affine geometries obtained from projective planes and skew resolutions on AG(3,q) 368
Chapter 34. Automorphisms and generalized incidence matrices of divisible designs 390
Chapter 35. Some results on partial Steiner quadruple systems 414
Chapter 36. Some recent results on cylic Steiner quadruple systems - A survey 422
Chapter 37. On a conjecture of S. Ilkka 432
Chapter 38. On homologies of fixed-point-free affine groups 440
Chapter 39. On Pellegrino’s 20 -caps in S4,3 446
Chapter 40. Caps in elliptic quadrics 462
Chapter 41. On Cohnfunctions 480
Chapter 42. A class of strongIy regular graphs related to orthogonal groups 482
Chapter 43. On the non-existence of a semi-symmetric 3-design with 78 points 486
Chapter 44. On certain linear congruence class geometries 494
Chapter 45. Translation planes of characteristic p that admit SL(2,pr) 506
Chapter 46. Nondesarguesian planes, partial geometries, strongly regular graphs and codes arising from hyperbolic quadrics 524
Chapter 47. The projectivity groups of ovals and of quadratic sets 532
Chapter 48. On R-sequenceability and Rh-sequenceability of groups 548
Chapter 49. On the characterization of finite miquelin möbius planes 562
Chapter 50. A physical characterization of conformal transformations of Minkowski spacetime 580
Chapter 51. The van der waerden conjecture 588
Chapter 52. Some extremal results about the genus of a pair of permutations 594
Chapter 53. Partial parallelism spaces and slit spaces 604
Chapter 54. On a class of kinematic spaces 614
Chapter 55. A brief survey of covering radius 630
Chapter 56. A graphic characterization of the lines of an affine space 638
Chapter 57. Z2-cohomology of projective spaces of odd order 648
Chapter 58. Inequalities for point stable designs 666
Chapter 59. On the structure of translation generalized quadrangles 674
Chapter 60. Sur les k-arcs complets des planes de Galois d'ordre impair 680
Chapter 61. The bundles axiom and egglike subsets of projective spaces 708
Chapter 62. Kirkman cubes 712
Chapter 63. Sulle ovali dei piani desarguesiani finiti d'ordine pari 726
Chapter 64. Groups on points and sets 734
Chapter 65. An application of combinatorics of Young tableaux to geomeric problems 738
Chapter 66. Two characters k-sets with respect to a singular space in PG(r,q) 744
Chapter 67. Moufang conditions of finite generalized quadrangles 758
Chapter 68. Nilinearly generated near-algebras 766
Chapter 69. Affine planes and latin squares 774
Chapter 70. Composition of rotations of graphs 782
Chapter 71. A survey on varieties of PG(4,q) and Baer subplanes of translation planes 788
Chapter 72. On travalent graphs embedded in twisted honeycombs 794
Chapter 73. Restricted Mi-spaces, restricted Li-spaces, optimal codes and n-arcs 802
Chapter 74. Sur des classes de groupes finis résolubles 816
Chapter 75. Finite non-euclidean planes 818
Chapter 76. Other talks 832
List of participants 834

Produkt-Details

• Erscheint lt. Verlag: 1.1.1983
• Sprache: englisch
• Themenwelt: Mathematik / Informatik ► Mathematik ► Angewandte Mathematik
• Themenwelt: Mathematik / Informatik ► Mathematik ► Finanz- / Wirtschaftsmathematik
• Themenwelt: Mathematik / Informatik ► Mathematik ► Graphentheorie
• Themenwelt: Technik
• ISBN-10: 0-08-087189-5 / 0080871895
• ISBN-13: 978-0-08-087189-9 / 9780080871899