# Street-Fighting Mathematics

## by Sanjoy Mahajan

An excellent book that that shows how mathematics is really done in the real world.

Rather than following the pure mathematical approach where-by students are forced to prove every step
with an epsilon-delta type argument this book teaches another philosophy.

Street-fighting mathematics solves problems the way most science is *really* done: you take wild guesses, you use
approximations, plays with analogies, and uses every possible method at your disposal to make progress on your problem. Who
cares about mathematical rigor if you can't get even the coarsest solution to your problem. In this book Mahajan presents a number
of problem solving strategies and then provides examples at using them. This book is a true treasure to read. Readers unfamiliar with this book
can see what others have said here.

To learn this material as well as possible I worked through all of the book's end of chapter problems, wrote the
solutions up in the LaTeX mathematical typesetting language, and produced a PDF of the solutions.
For about a year now I had been giving this material away for free to anyone who requested a copy.
Recently I've decide to try to sell this material. I converted the PDF format to a format I thought more people
would find easier to read. You can preview and buy a kindle version of the
book **here**. If you are interested in purchasing the
PDF version please contact me below.

As always, I am interested in hearing about any errors that might exist in this material.

John Weatherwax
Last modified: Mon Aug 26 05:55:15 EDT 2013