Unformatted text preview: PART B: SETS OF NUMBERS A set is a collection of objects, called the elements or members of the set. • Two sets are equal when they consist of the same elements. Typically, order is irrelevant, and elements are not repeated. ± denotes the empty set , or null set , the set consisting of no elements. Let A and B be sets. A is a subset of B , denoted by A ± B , when every element of A is also an element of B . If A ± B , but A ± B , then A is a proper subset of B , denoted by A ± B . This means that B contains all of the elements of A , as well as at least one other element not in A ....
View
Full
Document
 Spring '09
 Real Numbers, Sets

Click to edit the document details