SET THEORY SYMBOLS

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Across
  1. 1. all the objects that do not belong to set A
  2. 3. is a subset of B. set A is included in set B.
  3. 7. objects that belong to set A and set B
  4. 11. set A is not a subset of set B
  5. 12. is a superset of B. set A includes set B
  6. 13. both sets have the same members
  7. 15. cardinality of countable ordinal numbers set
Down
  1. 2. Ø = { }
  2. 4. the number of elements of set A
  3. 5. all subsets of A
  4. 6. objects that belong to set A or set B
  5. 8. set A is not a superset of set B
  6. 9. such that
  7. 10. infinite cardinality of natural numbers set
  8. 14. a collection of elements