Set theory Symbols

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Across
  1. 6. A = B
  2. 7. |
  3. 10. |A|
  4. 11. all the objects that do not belong to set A
  5. 12. 2A
  6. 13. A is a subset of B. set A is included in set B
Down
  1. 1. set of all possible values
  2. 2. A ∆ B
  3. 3. (a,b)
  4. 4. A ∩ B
  5. 5. A ⊇ B
  6. 8. a collection of elements
  7. 9. A \ B
  8. 14. A ∪ B
  9. 15. Ø = { }