Hamilton-圈

G 1

G 2

G 3

G 6

G 7

完美匹配的交

M 4 M 5 =

M 3 M 5 =

M 2 M 5 =

M 4 M 7 =

M 4 M 6 =

完美匹配的不交并

M 4 ˙ M 5

M 3 ˙ M 5

M 2 ˙ M 5

M 4 ˙ M 7

M 4 ˙ M 6