Delve Into Set Theory Symbols!

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Across
  1. 2. {}
  2. 3. A=B
  3. 5. (a,b)
  4. 6. A'
  5. 7. set of all possible values
  6. 10. such that
  7. 11. A⊇B
  8. 13. ℵ1
  9. 14. A⋃B
Down
  1. 1. A⊖B
  2. 4. A⋂B
  3. 8. ℵ0
  4. 9. |A|
  5. 11. A⊆B
  6. 12. a∈A