Ted Sundstrom

Digital versions PDF
Latex source No
Exercises Yes
Solutions Answers and hints to selected problems
Creative Commons Attribution-NonCommercial-ShareAlike
  • First recipient of the MAA’s Daniel Solow award for undergraduate teaching materials
  • Sophomore level text for an introduction to proofs course
  • Version 3, 2020
  • Originally published by Pearson (two editions: 2003 and 2007)
  • Printed version from Amazon for $22, Kindle version $10
  • Nine chapters, 612 pages
  • Solution manual for instructors available from author
  • Progress checks, Beginning activities, Evaluation of proofs, Study guides
  • 107 videos, each four to ten minutes long
  • Course adoption list on book’s homepage
  • For more information and to download

This book emphasizes effective communication of mathematics through writing and it promotes active learning by the students. Notable features include beginning activities for each section intended for students to do before class and progress checks within the text for the student to do on the spot, with answers at the end of the book.

Some exercises are “Evaluation of Proofs,” described in the preface:

For these exercises, there is a proposed proof of a proposition. However, the proposition may be true or may be false. If a proposition is false, the proposed proof is, of course, incorrect, and the student is asked to find the error in the proof and then provide a counterexample showing that the proposition is false. However, if the proposition is true, the proof may be incorrect or not well written. In keeping with the emphasis on writing, students are then asked to correct the proof and/or provide a well-written proof according to the guidelines established in the book.


  1. Introduction
  2. Logical Reasoning
  3. Constructing and Writing Proofs
  4. Mathematical Induction
  5. Set Theory
  6. Functions
  7. Equivalence Relations
  8. Topics in Number Theory
  9. Finite and Infinite Sets