SET THEORY SYMBOLS

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Across
  1. 3. Ø = { }
  2. 5. A ⊂ B
  3. 6. collection of 2 elements
  4. 7. A ∩ B
  5. 11. A ⊇ B
  6. 13. A \ B
  7. 14. example A ∪ B = {3,7,9,14,28}
  8. 15. all subsets of A
Down
  1. 1. the number of elements of set A
  2. 2. no set membership
  3. 4. A ∆ B
  4. 8. set all subsets of A
  5. 9. no set membership
  6. 10. A ⊆ B
  7. 12. a collection of elements