Set Theory

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Across
  1. 6. { }
  2. 7. A ∆ B
  3. 11. (a,b)
  4. 12. A ∩ B
  5. 13. |
  6. 14. Ø
Down
  1. 1. all subsets of A
  2. 2. A ⊇ B
  3. 3. A ⊂ B
  4. 4. |A|
  5. 5. Ac
  6. 8. A ⊆ B
  7. 9. #A
  8. 10. A ∪ B
  9. 14. A = B