SET THEORY SYMBOLS

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Across
  1. 3. pair, (a,b)
  2. 4. set, A is a superset of B, set A includes set B
  3. 9. set, set of all possible values
  4. 11. set, ∅
  5. 14. |A|
  6. 15. A ∩ B
Down
  1. 1. set, all subset of A
  2. 2. infinite cardinality of natural numbers set
  3. 5. A U B
  4. 6. A ⊆ B
  5. 7. number set, R= {x | -∞ < x <∞}
  6. 8. difference, A ∆ B
  7. 10. { }
  8. 12. A = B
  9. 13. bar, |