Set Theory

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Across
  1. 3. Ø={}
  2. 4. set A is not a superset of set B
  3. 5. both sets have the same members
  4. 8. the number of elements of set A
  5. 10. R
  6. 12. collection of elements
  7. 14. Z={...,−3,−2,−1,0,1,2,3,...}
Down
  1. 1. all subsets of A
  2. 2. collection of 2 elements
  3. 6. objects that belong to set A
  4. 7. set of all possible values
  5. 9. infinite cardinality of natural numbers set
  6. 11. A is a superset of B. set A includes set B
  7. 13. cardinality of countable ordinal numbers set
  8. 15. U