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