/* www-ATLAS of Group Representations. SL2(7) represented as 12 x 12 matrices over GF(3). */ F:=GF(3); x:=CambridgeMatrix(1,F,12,[ "010000000000", "200000000000", "100200000000", "011000000000", "000000100000", "000000010000", "000020000000", "000002000000", "000000000010", "000000000001", "000000002000", "000000000200"]); y:=CambridgeMatrix(1,F,12,[ "001000000000", "000100000000", "000010000000", "000001000000", "100000000000", "010000000000", "000000001000", "000000000100", "121002122110", "110110112201", "020012112012", "100011210211"]); G:=MatrixGroup<12,F|x,y>; print "Group G is SL2(7) < GL(12,GF(3))";