Hamilton-圈
G 2
G 3
G 4
G 5
G 7
G 8
完美匹配的交
M 3 ∩ M 6 = ∅
M 2 ∩ M 6 = ∅
M 5 ∩ M 9 = ∅
M 4 ∩ M 9 = ∅
M 1 ∩ M 8 = ∅
M 1 ∩ M 6 = ∅
完美匹配的不交并
M 3 ∪ ˙ M 6
M 2 ∪ ˙ M 6
M 5 ∪ ˙ M 9
M 4 ∪ ˙ M 9
M 1 ∪ ˙ M 8
M 1 ∪ ˙ M 6