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.

In 1920, she introduced the concepts of "left module" and "right module". The ideal theory of the whole ring written in 192 1 is a milestone in the development of commutative algebra. Among them, when Nott introduced the concept of integer ring (integer set itself is also a number ring), she was German, and the integer in German was called Zahlen, so she recorded the integer ring as Z at that time, and the integer set has been represented by Z ever since.

Extended data:

Representation of other sets:

Q: Rational number set

R: set of real numbers (including rational numbers and irrational numbers)

R+: positive real number set

R-: negative real number set

C: complex set

: empty set (a set without any elements)

N* or N+: positive integer set {1, 2,3, …}

Q+: Set of Positive Rational Numbers

Q-: set of negative rational numbers

Baidu Encyclopedia-Integer Set