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 ) defined by the primitive rank-3 action of the alternating groups A n where n ≥ 5 , on Ω { 2 } , the set of duads of Ω = { 1 , 2 , … , n } , are examined.