Discrete Mathematics Set Theory

12345678910111213
Across
  1. 4. the number of elements of a set.
  2. 5. a statement that is always false.
  3. 8. type of a diagram used to model sets.
  4. 9. a declarative sentence which is either true or false.
  5. 11. joining of two words using the word 'or'.
  6. 12. a statement that is always true.
  7. 13. a set that contains no elements.
Down
  1. 1. set of subsets.
  2. 2. an implication p -> q that can be proved by showing that if p is true then q is also true.
  3. 3. a statement that is neither true nor false.
  4. 6. the exact opposite of a statement.
  5. 7. elements that belong to two or more sets.
  6. 10. simplifying conditional or biconditional into basic form