Mathematics

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Across
  1. 3. A set with no elements.
  2. 6. A positive or negative whole number (including zero).
  3. 9. For two sets, all the elements that are in both sets.
  4. 10. An individual member of a set.
Down
  1. 1. A set whose elements are all also elements of a larger set.
  2. 2. A set containing the elements in a universal set, but not in the set under consideration.
  3. 4. A set with a fixed number of elements.
  4. 5. For two sets, all the elements in each set or both sets.
  5. 7. Two sets with no elements in common.
  6. 8. A set from which all other sets will be taken.