set theory

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Across
  1. 4. the name for and operator
  2. 9. logical expression that gives false for all possible inputs
  3. 10. when 2 sets have no elements present in common to both
  4. 12. for p->q , q-> p is
  5. 13. ((A')')=___
  6. 14. group of distinct elements
  7. 15. elements common to both sets
  8. 16. a null set is also called
Down
  1. 1. the name for or operator
  2. 2. a set that is not finite
  3. 3. for p->q , ~q->~p is
  4. 5. elements in atleast one of the set
  5. 6. when all elements of a set are present in another set they are both___ of each other
  6. 7. for p->q , ~p->~q is
  7. 8. AUA = A is ___ law
  8. 9. the number of elements present in a set
  9. 11. logical expression that gives true for all possible inputs