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.
- Elementary Number Theory by W Edwin Clark (highschool readable)
- A Computational Introduction to Number Theory and Algebra , by Victor Shoup (not verified)
- Functional Geometry, 2013, Sussman, Wisdom, Farr (undergrad)
- Mathematical Logic, by Stephen G Simpson (graduate)
- Foundation of Math, by Stephen G Simpson (graduate)
- Homotopy Type Theory
the following i have not verified.