20C05 16S34 5 20C07 3 20N15 3 11T71 2 94B05 2 94B15 2 94B60 2 Generalized Reed--Muller code 2 Reed--Muller code 2 dihedral group 2 group algebra 2 group code 2 idempotent 2 minimal code 2 quaternion group 2 radical 2 right(left) \(n\)-ary (co)-module algebra 2 right(left) \(n\)-ary (co)-module over (co)algebra 2 self-dual code; group algebra; Jacobson radical 2 1 17A40 1 20G40 1 general linear group 1 group ring 1 projective special linear group 1 serial ring 1 special linear group 1