Set theory symbols

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Across
  1. 2. the symbol is |A|
  2. 6. set A is not a superset of set B
  3. 8. the symbol is A=B
  4. 10. set of all possible values
  5. 12. the object that belong to set A and B
  6. 14. A is a subset of B. Set A is included in set B
  7. 15. it is a collection of 2 elements
Down
  1. 1. infinite cardinality of natural numbers set
  2. 3. the symbol is P(A)
  3. 4. all the objects that do not belong to set A
  4. 5. a collection of elements
  5. 7. the symbol is AUB
  6. 9. cardinality of countable ordinal numbers set
  7. 11. set A is not a subset of set B
  8. 13. A is superset of B. Set A includes set B