Sets

A set is a collection

A set is a collection of well-defined objects. The objects in a set are called elements or members. A collection is not a set if it is not clearly def

In roster form

In roster form, all elements are written inside curly braces and separated by commas. The order does not matter, and each element is written only once

In set

In set-builder form, a rule or condition is used to describe the elements of a set, such as {x : x ∈ N and x < 7}. The symbol ':' is read as 'such tha

A finite set has a limited

A finite set has a limited number of elements. An infinite set has no ending. A singleton set has only one element. The empty set has no elements and

Two sets are joint or overlapping

Two sets are joint or overlapping if they have at least one common element. Two sets are disjoint if they have no common element.