Lecture 5 (Discrete Math) Set Operations and Combinatorial Proofs

The lecture distinguishes set relations from set operations by saying that:

1. A.Relations return true or false; operations take sets and return sets.
2. B.Relations take sets and return sets; operations return true or false.
3. C.Relations and operations both return true or false on sets.
4. D.Relations and operations both take sets and return sets.