SE-3 21378

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Across
  1. 1. A set that is part of another set
  2. 3. The process of finding the union of sets
  3. 6. Elements that are in one set but not another
  4. 8. The set of all elements not in a given set
  5. 12. A set containing no elements
  6. 13. A set that contains other sets
  7. 17. A set formed by taking elements from one set
  8. 19. The largest set that is a subset of two given sets
  9. 20. Two sets with no elements in common
Down
  1. 2. Elements that are in either of two sets
  2. 4. A set that does not change under an operation
  3. 5. A subset containing all elements of the original set
  4. 7. A collection of distinct objects
  5. 9. Sets that have the same elements
  6. 10. The number of elements in a set
  7. 11. A diagram used to represent sets
  8. 14. Two sets that are equal
  9. 15. The set of all subsets of a given set
  10. 16. A set with all possible elements
  11. 18. An operation that combines all elements from two sets