V
= {1, 2, 3, 4, 5},
A
= {1, 2}
B
= {2, 3}
E
= {{1,5}, {3,5}, {2,4}}.
Then
N
(
A
) = {4,5},
N
(
B
) = {4,5},
N
(
A
) ∩
N
(
B
) = {4,5}
A
∩
B
= {2}
N
(
A
∩
B
) = {4}.