SET THEORY SYMBOLS

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Across
  1. 3. symbol name of A ⊄ B
  2. 7. it is a set of all possible values
  3. 8. symbol name of AxB
  4. 10. symbol name of #A
  5. 11. symbol name of AΔB
  6. 12. symbol name of A U B
  7. 13. cardinality of countable ordinal numbers set
  8. 14. Ø = { }
  9. 15. symbol name of |
Down
  1. 1. infinite cardinality of natural numbers set
  2. 2. objects that belong to set A and set B
  3. 4. symbol name of A ⊆ B
  4. 5. symbol name of A ⊇ B
  5. 6. it is a collection of elements
  6. 9. it is a collection of 2 elements; (a,b)