Introduction to number theory lecture 9: Congruences
Channel: Richard E Borcherds
Date: 2022-01-28

This lecture is part of my Berkeley math 115 course "Introduction to number theory"
For the other lectures in the course see https://www.youtube.com/playlist?list=PL8yHsr3EFj53L8sMbzIhhXSAOpuZ1Fov8

This lecture revies congruences, proves Fermat's theorem, and gives some applications of it. 

The textbook is "An introduction to the theory of numbers" by Niven, Zuckerman, and Montgomery (5th edition).