Sets
A set is a collection of objects—in which order does not matter. The objects can be anything: numbers, people, cats, courses, even other sets! The language of sets allows us to talk precisely about events. A set may be finite or infinite. Set Cardinality is only defined for finite sets and refers to how many elements are in the set. See as well Set Membership. Often times when it’s tedious or impossible to list out all elements in a set, we use Set-Builder Notation to describe the set.
Examples
- is the set of all odd numbers;
- is the set of vowels in the English alphabet;
- is the set of primary colors;
- is the set of common household pets;