Mathematical Reasoning: Writing and Proof
by Ted Sundstrom

Version 2.0 is now available.


Note to Instructors

Please contact me at for information about instructor resources such as solutions to the preview activities and solutions to the exercises.

This textbook is designed for the first course in the college mathematics curriculum that introduces students to the process of constructing and writing proofs.

A low-cost (less than $20) print-on-demand version of this book is now available at  It is also available at

This book is included in the approved list of textbooks for the Open Textbook Initiative  by the American Institute of Mathematics.

To make suggestions about the book, please send an email message to me at

Screencasts for Use with this Book

Dr. Robert Talbert, a colleague of mine at Grand Valley State University, has developed a collection of over 100 screencasts for use with this textbook. These screencasts are an excellent supplement for students to use, especially for those instructors teaching their course with an inverted or flipped classroom model.  Click here to access these screencasts.

Version 1.1
There are no changes in content between Version 2.0 and Version 1.1.  The only change is that the appendix now contains solutions and hints for more exericses.  In addition, the study guides for the book have been revised to contain a list of exercises to complete.  All exercises in these lists have solutions or hints in the appendix.

Version 1.1 of the book is still available.  Click here to download Version 1.1 or click here to purchase it at

Previous Versions of the Book

Previous versions of this textbook were published by Pearson Education, Inc.  The current textbook is a revision of the second edition .  The following link opens a file with a description of the changes in the second edition that have been incorporated in the current version of the textbook.