Denkov N. Relations and Functions 2022

Textbook in PDF format

“Relations and Functions” are the most important topics in algebra. In mathematics, a function can be defined as a rule that relates every element in one set, called the domain, to exactly one element in another set, called the range. This book explains everything you need to know about the basics of relations and functions: what a relation is, what a function is, and when a relation is, or isn't, a function