SET THEORY

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Across
  1. 5. A\B
  2. 6. A∆B
  3. 9. set A is not a subset of B
  4. 11. all subsets of A
  5. 13. (a,b)
  6. 14. if all elements of set A are elements of the set B
  7. 15. objects that belongs to set A or set B
Down
  1. 1. #A
  2. 2. A is subset of B, but A is not equal to B
  3. 3. all objects that do not belong to set A
  4. 4. set of all possible values
  5. 7. collection of elements
  6. 8. objects that belongs to set A and Set B
  7. 10. elements of set A are also the elements of set B
  8. 12. A=B