OVERLAPPING SET
Two sets A & B are called overlapping set if they have at least one element in common that is A ∩ B ≠ φ
Example.-
Let A = { x : x is prime and x < 10 } and B = { first two natural numbers }
Then, A = { 2, 3, 5, 7 } and B = { 1, 3, 5 }
So, A ∩ B = { 2, 3, 5, 7 } ∩ { 1, 3, 5 } = { 3, 5 }
So, A ∩ B ≠ φ, where A & B are overlapping set