Combinatorics '84 (eBook)

Front Cover 1
Combinatorics 84 4
Copyrights Page 5
Contents 10
Preface 6
Chapter 1. Intervento di apertura a1 Convegno 8
Chapter 2. Translation planes with an automorphism group isomorphic to SL(2,5) 14
Chapter 3. Symplectic geometry, quasigroups, and Steiner systems 22
Chapter 4. On a test of dominance, a strategic decomposition and structures T(t,q,r,n) 28
Chapter 5. On n-fold blocking sets 44
Chapter 6. Embedding finite linear spaces in projective planes 52
Chapter 7. Veronese quadruples 70
Chapter 8. S-partitions of groups and Steiner systems 82
Chapter 9. Collineation groups strongly irreducible on an oval 98
Chapter 10. On sets of Plücker class two in PG(3,q) 112
Chapter 11. A free extension process yielding a projective geometry 118
Chapter 12. Symmetric functions and symmetric species 120
Chapter 13. On thick (Q+2) -sets 128
Chapter 14. On a generalization of injection geometries 138
Chapter 15. A new characterization of hypercubes 150
Chapter 16. F-binomial coefficients and related combinatorial topics: perfect matroid designs posets of full binomial type and F-geodetic graphs 156
Chapter 17. Polynomial sequences associated with a class of incidence coalgebras 172
Chapter 18. R-regularity and characterizations of the generalized quadrangle P(W(s) , (8)) 184
Chapter 19. On permutation arrays, transversal seminets and related structures 198
Chapter 20. Pascalian configurations in projective planes 216
Chapter 21. Monomial code-isomorphisms 230
Chapter 22. On the crossing number of generalized Petersen graphs 238
Chapter 23. Complete arcs in planes of square order 256
Chapter 24. On the maximum number of SQS(v) having a prescribed PQS in common 264
Chapter 25. On finite translation structures with proper dilatations 276
Chapter 26. Sharply 3-transitive groups generated by involutions 282
Chapter 27. On the generalized chromatic number 288
Chapter 28. A construction of sets of pairwise orthogonal F-squares of composite order 298
Chapter 29. Right S-n-partitions for a group and representation of geometrical spaces of type “n-Steiner” 304
Chapter 30. On block sharing Steiner quadruple systems 310
Chapter 31. Roots of affine polynomials 316
Chapter 32. On the parameter D(v,tv-13) for Steiner triple systems 324
Chapter 33. A new construction of doubly diagonal orthogonal latin squares 344
Chapter 34. On the maximal number of mutually orthogonal F-squares 348
Chapter 35. Cartesian products of graphs and their crossing numbers 352
Chapter 36. Ovoids and caps in planar spaces 360
Chapter 37. (k,n f)-Arcs and caps in finite projective spaces
Chapter 38. Combinatorial structures corresponding to reflective circulant (0, 1)-matrices 376
Chapter 39. Ovals in Steiner triple systems 386
Participants 396
Annals of Discrete Mathematics 402