University of California, San Diego: Edward Bender and S. Williamson's "Sets, Equivalence and Order: Sets and Functions"

Study the identities involving complement on pages SF-3 and SF-4. For universal set E, E' = Ø= A ∩ A'; A - A = Ø. Study example 1 on SF-4; VENN diagrams are a visual representation of sets, which are useful for depicting set membership of complements as well as other sets resulting from set operations. Use a VENN diagram to prove one of the identities involving complement.