# Free Math Textbooks

These are books that i've verified them in one way or another. Some i've read and consider good, some i checked up the author and is reputable mathematician, some are well known professors i know of, etc.

## Number Theory

- Elementary Number Theory by W Edwin Clark (highschool readable)
- A Computational Introduction to Number Theory and Algebra , by Victor Shoup (not verified)

## Calculus

Here is a collection of calculus textbooks. These are top quality, and legally free.

- Calculus, by Jim Fowler, Bart Snapp (257 pages)
- APEX Calculus by Gregory Hartman et al (772 pages)
- Calculus Volume 1. OpenStax project (867 pages)

- not text book, but great. Journey Through Genius by William Dunham

## Linear Algebra

- my fav, back in 1993. not free, but $10 on amazon. Linear Algebra and Its Applications by David C. Lay

first course:

more abstract approach:

## Real Analysis

## Complex Analysis

## Differential Geometry

- Functional Geometry, 2013, Sussman, Wisdom, Farr (undergrad)

## Topology

## Logic, Proof Theory

- Mathematical Logic, by Stephen G Simpson (graduate)

- Foundation of Math, by Stephen G Simpson (graduate)

- Homotopy Type Theory (graduate)

## Infomation Theory

## Category Theory

## not verified

the following i have not verified.