Complement (set theory)
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5113-8696-6
High Quality Content by WIKIPEDIA articles! In set theory, a complement of a set A refers to things not in (that is, things outside of), A. The relative complement of A with respect to a set B, is the set of elements in B but not in A. When all sets under