Fernando Q. GouvêaCarter Professor of Mathematics

I work in the Department of Mathematics at Colby College. The links will take you to the department home page and the Colby home page. There’s also an official professional profile page.
I am on sabbatical for the 2022–23 academic year. I'll be working on the history of algebraic number theory, focusing especially on the work of Kurt Hensel in the late 19th and early 20th centuries.
Sometimes I feel preachy. Here are my notes for majors.
If you need a letter of recommendation, please email me. If I agree to write a letter, I may ask you for more information; the more you can provide, the better.
Padic Numbers: The third edition is out! If you have access, you can read it on SpringerLink. The big change is that throughout the book I have included material on how to do padic computations with Sage and GP. There were many smaller changes as well: typos and mistakes have been corrected, chapters were reorganized, and a few new sections were added.
The book is exactly what the title says: an introduction to padic numbers and padic analysis aimed at mathematics undergraduates. It tries to be open up the theory to the reader in a friendly and accessible way while giving lots of hints about more advanced topics and applications.
Check here for a table of contents, errata, notes, and other comments about the book. I’m always happy to receive comments and corrections, of course.
First  Second  Second Dover  Expanded  Second Expanded  Taiwan  Slovenia  Brazil  Netherlands  China 
Math through the Ages: A Gentle History for Teachers and Others, which I wrote together with Bill Berlinghoff, was originally published by Oxton House Publishers in mid2002. The second edition appeared late in 2014 (originally from Oxton House) and (in the “Expanded” version) 2015, from MAA Press, now an imprint of the AMS. Tthe nonexpanded version is now published by Dover.
The book is an introduction to the history of mathematics with the needs of mathematics teachers chiefly in mind. But it’s not just for teachers; if you would like to begin to learn about the history of mathematics, we think this short and readable book is a good place to start.
The main differences between the expanded second edition and the justplain second edition are:
Apart from this, the two versions are identical. The goal of Math through the Ages is to be both readable and correct, to serve as a “gentle” textbook that you can rely on. The Dover version is very affordable; buy copies for all your friends!
Pathways from the Past is an offshoot from Math through the Ages. We decided to try our hand at doing what we recommended, providing teachers with something they could use without further ado.
There are two volumes. Each contains historicallybased worksheets that teachers can use to teach mathematics. Each set of worksheets comes with a 64page teacher’s manual that provides historical background and some guidance on how to use this material in class.
There are two sets of worksheets. Pathways I focuses on Numbers, Numerals, and Arithmetic, while Pathways II is about Algebra. Both sets were originally published by Oxton House. Since they are no longer in business, we have decided to make these available online:
Math through the Ages has been translated into five other languages; you can see the covers of those editions above.
A Guide to Groups, Rings, and Fields is a survey of graduate algebra, aimed principally at those who want to review the subject. Aside from a couple of broadly introductory chapters, the book looks at groups, group actions, and group representation; rings and their modules; fields, skew fields, and Galois theory.
The original vision for this book was that it might serve as a refresher and/or review, either for graduate students preparing for their quals or for professionals in other parts of mathematics. There are no proofs, but I hope readers will find it a useful overview of the material. The link takes you to the main page for the book, where I also keep a list of currentlyknown errors and misprints.
Arithmetic of padic Modular Forms was my first book, based on my PhD thesis. It is desperately outofdate, since the field has progressed a lot since I wrote it in the late 1980s. Many things I couldn’t prove then have since been proved. In particular, nowadays one would want to approach the theory from the point of view of padic analytic geometry.
I’ve written a lot of other stuff, of course. Here is the full list.
Material available on the web: This page lists some material I’ve written and which is available on the web.
Interests: My research interests are:
As a spectator, rather than as an active player, I also try to keep in touch with lots of other fields in mathematics. Outside mathematics, I am interested in many things, with varying intensity over time: modern science fiction, comic books, Christian theology, patristics, fountain pens, literature and poetry, politics, wine, perfume, and lots of other things. Some of my pet peeves are bad grammar, perfume companies who stop making what I like (e.g., Guerlain’s Arsène Lupin Dandy), pens that leak, proofs I can’t understand.