MAT246H1 Lecture Notes - Surjective Function, Natural Number, Bijection

• School: UTSG
• Department: Mathematics
• Course: MAT246H1
• Professor: Regina

Document Summary

The things are called elements of the set. If s is a set, a subset of s is a set all of whose elements are elements of the set s. the empty set is the set that has no elements at all. The empty set is a subset of every set. The union of a collection of sets is the set consisting of all elements that occur in any of the given sets. The intersection of a collection of sets is the set containing all elements that are in every set in the given collection. If the intersection of two sets is the empty set, the sets are said to be disjoint. The set s and t are said to have the same cardinality if their elements can be paired with each other"s. The notation is used to denote a function taking the set into the set.