The symbol of complement set is generally expressed as: cup, where p is the name of any set.

Symbol of basic set:

1, the set of all non-negative integers is called the set of non-negative integers (or the set of natural numbers), and is recorded as n.

2. A set divided by 0 in a non-negative integer set, also called a positive integer set, is recorded as N+ (or N*).

3. The set of all integers is called integer set, and Z is recorded.

4. The set of all rational numbers is called rational number set for short, and is denoted as Q ..

5. The set of all real numbers is called real number set for short, and is recorded as R..

6. the complex set is counted as C.

Representation of the set:.

1, enumeration: it is often used to represent a finite set, and all the elements in the set are listed one by one and written in braces.

2. Description method: it is often used to represent an infinite set. The common attributes of elements in the set are described by words, symbols or expressions, and written in braces.

3. Schema method (venn diagram): A closed curve (or circle) is often drawn, and a set is represented by its interior.

Refer to the above content: Baidu Encyclopedia-Mathematical Collection