On the dual binary codes of the triangular graphs

The stabilizers of the minimum-weight codewords of dual binary codes obtained from the strongly regular graphs T(n)T(n) defined by the primitive rank-3 action of the alternating groups AnAn where n≥5n≥5, on Ω{2}Ω{2}, the set of duads of Ω={1,2,…,n}Ω={1,2,…,n}, are examined.