algebra=代数学

This book is intended to provide a reasonably self-contained theory of basic algebra suitable for an introductory course. The text consists of five chapters which are designed for a one-semester course taken by the students who have learned linear algebra. All contents in this book are standard and essential as an introductory course in algebra. There is a fairly large number of examples to help the readers understand the contents of this book. Hopefully, these examples will make the theory more alive, more meaningful, more visual, and easier to be grasped. Moreover, there is a series of exercises at the end of each section. Some of the exercises test the understanding of the text in the usual way, while some are arranged as a supplement and extension of the contents in this book.