Set theory symbol

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Across
  1. 1. such that
  2. 4. both sets have the same members
  3. 8. no set membership
  4. 10. object that belong to A or B but not to their intersection
  5. 11. a collection of elements
  6. 12. object that belongs to set A or B
  7. 13. all subsets of A
  8. 15. set A is not a superset of set B
Down
  1. 2. object that belong to B and not to B
  2. 3. all the object that do not belong to set A
  3. 5. object that belongs to set A and B
  4. 6. A is a subset of B
  5. 7. collection of two elements
  6. 9. element of belong to
  7. 14. A is a superset of B set A includes set B