Lattices and association schemes: a unimodular example without roots in dimension 28
Roland Bacher, Boris Venkov 路 Annales de l鈥檌nstitut Fourier 路 1995
Some interesting lattices can be constructed using association schemes. We illustrate this by a unimodular lattice without roots of dimension 28 which admits Sp ( 6 , 饾斀 3 ) 路 2 as its automorphism group.