Across
- 3. A relation R on a set A is ….. if whenever aRb then bRa, that is, if whenever (a, b) ∈ R then (b, a) ∈ R.
- 4. …..is a declarative statement which is true or false, but not both.
Down
- 1. ….. denoted by p <-> q
- 2. Two sets A and B are said to be ….. if they have no elements in common.