Monadic Circle Bar means
mat
1 2 3 4
5 6 7 8
9 10 11 12
⊖ mat
9 10 11 12
5 6 7 8
1 2 3 4
Dyadic Circle Bar means
0 1 2 ¯1 ⊖ mat
1 6 11 12
5 10 3 4
9 2 7 8
mat
1 2 3 4
5 6 7 8
9 10 11 12
⊖ mat
9 10 11 12
5 6 7 8
1 2 3 4
0 1 2 ¯1 ⊖ mat
1 6 11 12
5 10 3 4
9 2 7 8