Set Theory Symbols

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Across
  1. 2. all subsets of A
  2. 5. A ∆ B
  3. 7. all the objects that do not belong to set A
  4. 9. A ∪ B
  5. 10. |A|
  6. 13. objects that belong to A and not to B
  7. 14. infinite cardinality of natural numbers set
  8. 15. A ⊇ B
Down
  1. 1. objects that belong to set A and set B
  2. 3. A ⊆ B
  3. 4. A×B
  4. 6. A = B
  5. 8. collection of 2 elements
  6. 11. a collection of elements
  7. 12. Ø = { }