Journal of Algebraic Combinatorics

, Volume 29, Issue 2, pp 195–213

On the order of a non-abelian representation group of a slim dense near hexagon


DOI: 10.1007/s10801-008-0129-0

Cite this article as:
Sahoo, B.K. & Sastry, N.S.N. J Algebr Comb (2009) 29: 195. doi:10.1007/s10801-008-0129-0


In this paper we study the possible orders of a non-abelian representation group of a slim dense near hexagon. We prove that if the representation group R of a slim dense near hexagon S is non-abelian, then R is a 2-group of exponent 4 and |R|=2β, 1+NPdim(S)≤β≤1+dimV(S), where NPdim(S) is the near polygon embedding dimension of S and dimV(S) is the dimension of the universal representation module V(S) of S. Further, if β=1+NPdim(S), then R is necessarily an extraspecial 2-group. In that case, we determine the type of the extraspecial 2-group in each case. We also deduce that the universal representation group of S is a central product of an extraspecial 2-group and an abelian 2-group of exponent at most 4.


Near polygons Non-abelian representations Generalized quadrangles Extraspecial 2-groups 

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of MathematicsNational Institute of TechnologyRourkelaIndia
  2. 2.Statistics and Mathematics UnitIndian Statistical InstituteBangaloreIndia