Abstract
We show that a non-symmetric nearly triply regular \( 2 - \left( {{q^n},{q^{{n - 1}}},\frac{{{q^{{n - 1}}} - 1}}{{q - 1}}} \right) \)design D with υ1 = q n -2, υ2 = q n -3 and in which every line has at least q points is AG(n, q) for prime power q > 2 and positive integer n ≥ 3.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
A. R. Calderbank, Geometric invariants for quasi-symmetric designs, J. Combin. Theory (A), Vol. 47 (1988) pp. 101–110.
A. R. Calderbank and P. Morton, Quasi-symmetric 3-designs and elliptic curves, SIAM J. Discrete Math., Vol. 3 (1990) pp. 178–196.
P. J. Cameron, Near regularity conditions for designs, Geometriae Dedicata, Vol. 2 (1973) pp. 213–223.
P. Dembowski, Finite Geometries, Springer-Verlag, Berlin-Heidelberg-New York (1968).
M. Herzog and K. B. Reid, Regularity in tournaments, in: Theory and Applications of Graphs Proceedings, Michigan, 1976, Lecture Notes in Math., Springer-Verlag, Berlin, 642 (1978) pp. 442–453.
J. Hirschfeld, Projective Geometries over Finite Fields, Oxford University Press, Oxford (1983).
N. Ito, Nearly triply regular hadamard designs and tournaments, Math. J. Okayama Univ., Vol. 32 (1990) pp. 1–5.
W. Kantor, Automorphisms and isomorphisms of symmetric and affine designs, J. Alg. Combin., Vol. 3 (1994) pp.307–338.
C. E. Praeger and B. P. Raposa, Non-symmetric nearly triply regular designs, Discrete Math., to appear.
S. S. Sane and M. S. Shrikhande, Quasi-symmetric 2,3,4-designs, Combinatorica, Vol. 7 (1987) pp. 291–301.
S. S. Sane and M. S. Shrikhande, Characterisations of quasi-symmetric designs with a spread, Designs, Codes and Cryptography, to appear.
M. S. Shrikhande and S. S. Sane, Quasi-symmetric Designs, London Math. Soc. Lecture Note Series, Cambridge University Press, Cambridge, 164 (1991.)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Additional information
Dedicated to Hanfried Lenz on the occasion of his 80th birthday
Rights and permissions
Copyright information
© 1996 Kluwer Academic Publishers, Boston
About this chapter
Cite this chapter
Pascasio, A.A., Praeger, C.E., Raposa, B.P. (1996). On the Characterisation of AG(n, q) by its Parameters as a Nearly Triply Regular Design. In: Jungnickel, D. (eds) Designs and Finite Geometries. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1395-3_13
Download citation
DOI: https://doi.org/10.1007/978-1-4613-1395-3_13
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-8604-2
Online ISBN: 978-1-4613-1395-3
eBook Packages: Springer Book Archive