10.4. 2Z = { …, 0, 2, 4, 6, 8, 10, …}, H = { …, 0, 8, 16, 24, 32, … }.
Aριστερά σύμπλοκα:
0 + H = H = 8 + H = 16 + H= …
2 + H = { …, 2, 10, 18, 26, 34, … } = 10 + H = 18 + H = …
4 + H = { …, 4, 12, 20, 28, 36, … } = 12 + H = 20 + H = …
6 + H = { …, 6, 14, 22, 30, 38, … } = 14 + H = 22 + H = …