SET THEORY

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Across
  1. 7. |A| (symbol name)
  2. 8. A ⊃ B (symbol name)
  3. 10. a ∈ B (symbol name)
  4. 11. A ⊂ B (symbol name)
  5. 12. A ∪ B (symbol name)
  6. 13. A ⊇ B (symbol name)
  7. 14. Ac (symbol name)
  8. 15. A ∩ B (symbol name)
Down
  1. 1. A \ B or A - B (symbol name)
  2. 2. A = B (symbol name)
  3. 3. Ø (symbol name)
  4. 4. (a,b) (symbol name)
  5. 5. A ∆ B (symbol name)
  6. 6. A ⊄ B (symbol name)
  7. 9. A ⊅ B (symbol name)