Across
- 2. objects that belong to set A and set B
- 6. A ∪ B
- 8. |A| ,#A
- 10. set of all possible values
- 12. collection of 2 elements
- 14. infinite cardinality of natural numbers set
- 15. objects that belong to A or B but not to their intersection
Down
- 1. a collection of elements
- 3. R = {x | -∞ < x <∞}
- 4. both sets have the same members
- 5. all the objects that do not belong to set A
- 7. such that
- 9. cardinality of countable ordinal numbers set
- 11. Ø
- 13. A is a subset of B. set A is included in set B.