Set Theory Symbols

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