Set Theory Symbols

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Across
  1. 3. null ℵ0
  2. 4. A ⊆ B
  3. 5. A = B
  4. 6. |A|
  5. 9. A ⊇ B
  6. 14. subset A ⊂ B
  7. 15. subset A ⊄ B
Down
  1. 1. A ∩ B
  2. 2. Ac
  3. 7. one ℵ1
  4. 8. superset A ⊅ B
  5. 10. A ∪ B
  6. 11. set ∅
  7. 12. set P(A)
  8. 13. { }