Association Schemes

Association schemes were invented by statisticians on orderto enable them to extend their range of block designs from2-designs to partially balanced designs. Ho... » 

Association schemes were invented by statisticians on orderto enable them to extend their range of block designs from2-designs to partially balanced designs. However, they have intrinsic interest to combinatorialists and to group theorists as they include strongly regular graphs and schemes based on Abelian groups. «