Integer set A set of all integers is called an integer set. It includes all positive integers, all negative integers and zeros. In mathematics, integer sets are usually represented by z.

Extended data

There are usually four methods to represent a set, namely enumeration method, description method, image method and symbol method.

Enumeration is a method of enumerating the elements of a collection one by one. For example, the three primary colors in optics can be represented by the set {red, green and blue}; The set A composed of four letters A, B, C and D can be represented by A={a, B, C, d}, and so on.

Descriptive methods Descriptive methods are in the form of {representing the attributes that the element | satisfies}.

Let the set S consist of all elements with a certain property p, then the set can be expressed by describing the common properties of the elements in the set: S={x|P(x)}.

Mirror image method, also known as Wayne diagram method and Webster diagram method, is a method of representing a set with a set of points on a two-dimensional plane. A set is generally represented by a rectangle or a circle on a plane, which is an intuitive graphical representation of the set.