Set Theory Symbols

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Across
  1. 3. A×B
  2. 4. all the objects that do not belong to set A
  3. 7. set A is included in set B.
  4. 8. infinite cardinality of natural numbers set
  5. 9. the number of elements of set A
  6. 12. such that
Down
  1. 1. objects that belong to set A or set B
  2. 2. set A includes set B
  3. 3. ℂ
  4. 5. both sets have the same members
  5. 6. Ø
  6. 10. ℝ
  7. 11. a collection of elements
  8. 13. ℚ
  9. 14. objects that belong to set A and set B