Example

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123456789101112131415
Across
  1. 5. subset set A is not a subset of set B
  2. 6. power set
  3. 8. objects that belong to set A and set B
  4. 10. objects that belong to set A or set B
  5. 11. infinite cardinality of natural numbers set
  6. 13. cardinality of countable ordinal numbers set
  7. 14. both sets have the same members
Down
  1. 1. the number of elements of set A
  2. 2. numbers set \mathbb{Q} = {x | x=a/b, a,b∈\mathbb{Z}}
  3. 3. bar such that
  4. 4. set Ø = { }
  5. 7. A is a superset of B. set A includes set B
  6. 8. numbers set \mathbb{Z} = {...-3,-2,-1,0,1,2,3,..
  7. 9. a collection of elements
  8. 12. numbers set \mathbb{R} = {x | -∞ < x <∞}
  9. 15. set set of all possible values