SET THEORY SYMBOLS

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Across
  1. 4. Two sets are equal if they contain exactly the same elements.
  2. 5. of two sets is the set of all elements that are in either set, but not in both.
  3. 9. is a subset that is not equal to the original set.
  4. 14. of a set A with respect to a set B is the set of all elements that are in A but not in B.
  5. 15. is the cardinality of the set of natural numbers.
Down
  1. 1. of a set is the set of all elements that are not in the original set, but are in a universal set.
  2. 2. is the number of elements in a set.
  3. 3. is a set that contains no elements.
  4. 6. two sets is a set that contains only the elements that are common to both sets.
  5. 7. is a pair of elements where the order matters.
  6. 8. is a set that contains all the elements of another set.
  7. 10. of a set is the set of all possible subsets of that set, including the empty set and the set itself.
  8. 11. is the number of elements in a set.
  9. 12. of two sets is a set that contains all the elements of both sets.
  10. 13. is a well-defined collection of distinct objects.