Combinatorics ’81 in honour of Beniamino Segre, Proceedings of the International Conference on Combinatorial Geometrics and their Applications

Content: 
Edited by
Pages ii-iii

Copyright page
Page iv

Preface
Page v
Adriano Barlotti, Pier Vittorio Ceccherini, Guiseppe Tallini

Address to Participants
Pages xii,1-3
A. Barlotti

Beniamino Segre Original Research Article
Pages 5-12
G. Tallini

Complete Arcs in PG(2, q), q Even Original Research Article
Pages 13-15
L. Maria Abatangelo

Intorno AD UN Teorema DI Buekenhout Sulle Ovali Pascaliane Original Research Article
Pages 17-27
O. Amici, B. Casciaro

Orthogonality in Reflection Geometry Original Research Article
Pages 29-35
Friedrich Bachmann

On some Translation Planes Admitting a Frobenius Group of Collineations Original Research Article
Pages 37-53
Claudio Bartolone

Hall Triple Systems and Related Topics Original Research Article
Pages 55-60
Lucien Beneteau

On Mappings Preserving a Single Lorentz-Minkowski-Distance. I Original Research Article
Pages 61-76
Walter Benz

Designs Obtained from Affine Spaces Original Research Article
Pages 77-86
Carlo Bernasconi

On the Codes Generated by Certain Divisible Designs Original Research Article
Pages 87-93
T. Beth, D. Jungnickel

On a Characterization of the Grassmann Spaces Associated with an Affine Space Original Research Article
Pages 95-111
A. Bichara, F. Mazzocca

On a Characterization of Grassmann Space Representing the h-Dimensional Subspaces in a Projective Space Original Research Article
Pages 113-131
A. Bichara, G. Tallini

Enriched Cliques with Six Vertices Original Research Article
Pages 133-168
R.H. Bruck

Blocking Sets in Affine Planes Original Research Article
Pages 169-175
A.A. Bruen, M.J. de Resmini

Some Building Geometries of Spherical Type as Sets of Points and Lines Original Research Article
Pages 177-179
F. Buekenhout

“Cyclic” Solutions for Finite Projective Planes Original Research Article
Pages 181-191
K.A. Bush

Points and Lines in Metasymplectic Spaces Original Research Article
Pages 193-196
Arjeh M. Cohen

On Generalized Perfect Codes and Steiner Systems Original Research Article
Pages 197-200
G. Cohen, P. Frankl

Greedy Colourings of Steiner Triple Systems Original Research Article
Pages 201-207
C.J. Colbourn, M.J. Colbourn

Concurrence Geometries Original Research Article
Pages 209-223
Henry Crapo

(q2+q+l)-Sets of Type (0,1,2,q+l) in Translation Planes of Order q2 Original Research Article
Pages 225-228
Michele Crismale

The Embedding of (O,α)-Geometries in PG(n, q). Part I Original Research Article
Pages 229-240
F. de Clerck, J.A. Thas

On Cubic Surfaces Over a Field of Characteristic 3 Original Research Article
Pages 241-277
M. de Finis, M.J. de Resmin

Some Characterizations of Finite 3-Dimensional Projective Spaces and Affino-Projective Planes Original Research Article
Pages 279-282
A. Delandtsheer

On a Problem of A. Kotzig Original Research Article
Pages 283-290
J. Dénes

A Small 4-Design Original Research Article
Pages 291-294
R.H.F. Denniston

Some New Generalizations of Sharply t-Transitive Groups and Sets Original Research Article
Pages 295-314
M. Deza

Dissections of Polygons Original Research Article
Pages 315-318
J. Doyen, M. Landuyt

Group Modifications of Some Partial Groupoids Original Research Article
Pages 319-332
A. Drápal, T. Kepka

Bireflectionality Original Research Article
Pages 333-334
Erich W. Ellers

A Graphic Characterization of Hermitian Curves Original Research Article
Pages 335-342
G. Faina, G. Korchmáros

On the Connectivity of Maximal Planar Graphs with Minimum Degree 5 Original Research Article
Pages 343-353
Stefano Fanelli

Affine Geometries Obtained from Projective Planes and Skew Resolutions on AG(3,q) Original Research Article
Pages 355-375
R. Fuji-Hara, S.A. Vanstone

Automorphisms and Generalized Incidence Matrices of Point-Divisible Designs Original Research Article
Pages 377-400
Dina Ghinelli Smit

Some Results on Partial Steiner Quadruple Systems Original Research Article
Pages 401-408
Mario Gionfriddo

Some Recent Results on Cyclic Steiner Quadruple Systems - A Survey Original Research Article
Pages 409-417
M.J. Grannell, T.S. Griggs

On A Conjecture of S. Ilkka Original Research Article
Pages 419-426
L. Guerra, E. Ughi

On Homologies in Fixed-Point-Free Affine Groups Original Research Article
Pages 427-432
Christoph Hering

On Pellegrino\'s 20-Caps in S4, 3 Original Research Article
Pages 433-447
R. Hill

Caps in Elliptic Quadrics Original Research Article
Pages 449-466
J.W.P. Hirschfeld

On Cohnfunctions Original Research Article
Pages 467-468
Herbert Hotje

A Class of Strongly Regular Graphs Related to Orthogonal Groups Original Research Article
Pages 469-472
X. Hubaut, R. Metz

On the Non-Existence of a Semi-Symmetric 3-Design with 78 Points Original Research Article
Pages 473-479
Daniel Hughes

On Certain Linear Congruence Class Geometries Original Research Article
Pages 481-492
Thomas Ihringer

Translation Planes of Characteristic p That Admit SL(2,pr) Original Research Article
Pages 493-509
N.L. Johnson

Nondesarguesian Planes, Partial Geometries, Strongly Regular Graphs and Codes Arising from Hyperbolic Quadrics Original Research Article
Pages 511-517
William M. Kantor

The Projectivity Groups of Ovals and of Quadratic Sets Original Research Article
Pages 519-533
H. Karzel, M. Marchi

On R-Sequenceability and Rh-Sequenceability of Groups Original Research Article
Pages 535-548
A.D. Keedwell

On the Characterization of Finite Miquelian Möbius Planes Original Research Article
Pages 549-552
Hans-Joachim Kroll

Copolar Spaces Fully Embedded in Projective Spaces Original Research Article
Pages 553-566
C. Lefevre-Percsy

A Physical Characterization of Conformal Transformations of Minkowski Spacetime Original Research Article
Pages 567-574
J.A. Lester

The Van Der Waerden Conjecture Original Research Article
Pages 575-580
J.H. van Lint

Some Extremal Results about the Genus of a Pair of Permutations Original Research Article
Pages 581-590
A. Machi, P. Pizzi

Partial Parallelism Spaces and Slit Spaces Original Research Article
Pages 591-600
M. Marchi, S. Pianta

On a Class of Kinematic Spaces Original Research Article
Pages 601-615
M. Marchi, E. Zizioli

A Brief Survey of Covering Radius Original Research Article
Pages 617-623
H.F. Mattson Jr., J.R. Schatz

A Graphic Characterization of the Lines of an Affine Space Original Research Article
Pages 625-634
F. Mazzocca, D. Olanda

2 -Cohomology of Projective Spaces of Odd Order Original Research Article
Pages 635-651
W. Mielants, H. Leemans

Inequalities for Point Stable Designs Original Research Article
Pages 653-660
A. Neumaier, K.E. Wolff

On the Structure of Translation Generalized Quadrangles Original Research Article
Pages 661-665
Stanley E. Payne

Sur Les K-Arcs Complets Des Plans De Galois D\'Ordre Impair Original Research Article
Pages 667-694
Giuseppe Pellegrino

The Bundle Axiom and Egglike Subsets of Projective Spaces Original Research Article
Pages 695-698
Nicolas Percsy

Kirkman Cubes Original Research Article
Pages 699-712
A. Rosa, S.A. Vanstone

Sulle Ovali Dei Piani Desarguesiani Finiti D\'Ordine Pari Original Research Article
Pages 713-720
Luigi Antonio Rosati

Groups on Points and Sets Original Research Article
Pages 721-724
Jan Saxl

An Application of Combinatorics of Young Tableaux to Geometric Problems Original Research Article
Pages 725-730
Elisabetta Strickland

Two Characters K-Sets with Respect to a Singular Space in PG(r,q) Original Research Article
Pages 731-744
Maria Tallini Scafati

Moufang Conditions for Finite Generalized Quadrangles Original Research Article
Pages 745-751
J.A. Thas, S.E. Payne

Bilinearly Generated Near-Algebras Original Research Article
Pages 753-760
Momme Johs Thomsen

Affine Planes and Latin Squares Original Research Article
Pages 761-767
Klaus Vedder

Composition of Rotations of Graphs Original Research Article
Pages 769-773
Aldo G.S. Ventre

A Survey on Varieties of PG(4, q) and Baer Subplanes of Translation Planes Original Research Article
Pages 775-779
R. Vincenti

On Trivalent Graphs Embedded in Twisted Honeycombs Original Research Article
Pages 781-787
Asia Ivić Weiss

Restricted Mi-Spaces, Restricted Li-Spaces, Optimal Codes and n-Arcs Original Research Article
Pages 789-801
M.L.H. Willems

Sur Des Classes De Groupes Finis Résolubles Original Research Article
Pages 803-804
Guido Zappa

Finite Non-Euclidean Planes Original Research Article
Pages 805-817
H. Zeitler

Other Talks
Page 819

Participants
Pages 821-823