Reconstructing a generalized quadrangle with a hemisystem from a $4-$class association scheme
Combinatorics
2022-05-12 v1
Abstract
In 2013, van Dam, Martin and Muzychuk constructed a cometric antipodal class association scheme from a GQ of order , odd, which have a hemisystem. In this paper we characterize this scheme by its Krein array. The techniques which are used involve the triple intersection numbers introduced by Coolsaet and Juri\v{s}i\'c.
Cite
@article{arxiv.2205.05349,
title = {Reconstructing a generalized quadrangle with a hemisystem from a $4-$class association scheme},
author = {Giusy Monzillo},
journal= {arXiv preprint arXiv:2205.05349},
year = {2022}
}