CS202: Discrete Structures
University of California, San Diego: Edward Bender and S. Williamson's "Sets, Equivalence and Order: Sets and Functions"
This reading is the same as that for the previous section. For this section, study the definitions of complement and set difference on page SF-2.
A-B = {x : x ∈A and x B}, is called set difference, or the complement of B with respect to A.