codomains background

codomains

/koʊdoʊˈmeɪnz/

Illustration codomains - Image 1

noun

值域，到达域。

The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.

Examples :

"In Ms. Johnson's math class, the codomains of functions are always written on the board next to the domains, so students know the possible output values. "

在约翰逊老师的数学课上，函数的到达域（值域）总是写在黑板上，和定义域放在一起，这样学生就知道可能的输出值是什么了。