SET THEORY SYMBOLS

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