-- -*- M2-comint -*- hash: 15098281976490750853

i1 : F=GF(4,Variable=>a);

i2 : C=linearCode(matrix{{1,a,0},{0,1,a}});

i3 : D=dualCode(C)

                                  3
o3 = LinearCode{AmbientModule => F                           }
                BaseField => F
                cache => CacheTable{}
                Code => image | a+1 |
                              | a   |
                              | 1   |
                GeneratorMatrix => | a+1 a 1 |
                Generators => {{a + 1, a, 1}}
                ParityCheckMatrix => | 1 0 a+1 |
                                     | 0 1 a   |
                ParityCheckRows => {{1, 0, a + 1}, {0, 1, a}}

o3 : LinearCode

i4 : 
