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# How to Think Like a Mathematician

It’s the blog’s birthday! It’s also the week before the start of the university year here and so it’s a good time to shamelessly advertise my best selling book. The success of How to Think Like a Mathematician has taken me by surprise. It has sold nearly 10,000 copies since it was published. Ok, I’m not going to rival JK Rowling but given that the statistic often quoted in the publishing world is that 95% of books sell less than 5000 copies, I am really happy that the book has found an audience and I get emails from all round the world saying how much they like the book. It has been translated into French, German, Turkish and a Korean version will appear soon. (See links below.) It has been adopted as a textbook throughout the world – I’ve lost count of the places that use it.

Enough of the puff, what’s it about? Well, the book was written for anyone studying a mathematics degree or a mathematically based subject. My aim when I wrote it (it took me about 17 years but that’s another story) was to let students in on some of the secrets behind actually *thinking* like a mathematician so that learning mathematics becomes easier. The book has six parts:

*Study Skills for Mathematicians.**How to Think logically*.*Definitions, theorems and proofs**Techniques of proofs.**Mathematics that all good mathematicians need.**Closing remarks.*

This shows you how to read and write mathematics. The latter is an easy to learn skill and will set your work apart from most other students.

Mathematics is well known to be dependent on logic. Here you learn the basics from a very practical perspective.

A key difference between university and pre-university level mathematics is that it is now not just about calculating. Definitions are made precise, mathematical truths (called theorems) are stated and they have to be shown to be unequivocally true by giving a proof. In this part you learn how to pull apart definitions, theorems and proofs so that you understand them.

Now that you have to prove things you need some techniques to bring out as the need arises.

The title is self-explanatory. Many other books introduce university level mathematics but then forget to include the maths you will be studying in your course.

We pull together everything learned so that rather than rely on superficial rote learning you develop deep understanding.

Some of the tips in the book are simple but effective. The following is a taster: Many students asked to show that an equation holds will merely rearrange it an haphazard way to produce some other equation they know is true such as 1=1. (The reason why this is just plain wrong is given in Chapter 21, Some Common Mistakes. Hint: it is to do with logic.) Here’s a simple tip that works so much better:

Take the most complicated side and do something to reduce it to the other side.

This works. It stops you tying yourself in knots when randomly rearranging terms from one side to the other in the hope that something will happen. Instead it forces you to *think* about what you can do with the terms. It’s a simple trick that changes behaviour.

If you are interested in owning a copy, then just follow the links below:

How to Think Like a Mathematician: A Companion to Undergraduate Mathematics (UK)

How to Think Like a Mathematician: A Companion to Undergraduate Mathematics (US)

Wie man mathematisch denkt: Eine Einführung in die mathematische Arbeitstechnik für Studienanfänger (Deutschland)

Comment penser comme un mathématicien (France)

Matematikçi Gibi Düşünmek (Türkiye)

How to Think Like a Mathematician: A Companion to Undergraduate Mathematics (Italia)

How to Think Like a Mathematician Paperback: A Companion to Undergraduate Mathematics (España)

(Some of the above are affiliate links.)