DISJOINT OF TWO SETS
Two sets E & F are called Disjoint Set if they have no elements in common, that is E ∩ F = φ
Example –
Let, E = { x : x is a positive integers } and F = { x : x is a negative integers }
Then E = { 1, 2, 3, 4, 5, ………… } and F = { -1, -2, -3, -4, -5, …………. }
Then E ∩ F = { 1, 2, 3, 4, 5, ………… } ∩ { -1, -2, -3, -4, -5, …………. }
= φ
So, E & F are disjoint set.