set theory 21408

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Across
  1. 2. number of elements in the set
  2. 6. subsets of all elements in a set
  3. 7. unordered collection of elements
  4. 9. property to prove equivalence of 2 expressions
  5. 10. when a set remains the same even after performing operations on it with itself
Down
  1. 1. matchematical for of expressing english statements to logical expressions
  2. 3. very important principle used to solve problems
  3. 4. when we multiply 2 sets
  4. 5. a statement with truth value
  5. 8. equation form of elements