Theory of numbers: Congruences: Introduction
Channel: Richard E Borcherds
Date: 2021-01-28

This lecture is part of an online undergraduate course on the theory of numbers.

This lecture introduces congruences. We give some examples of using congruences to study the problem of which integers can be written as a sum of 2 or 3 squares or 3 cubes. 




For the other lectures in the course see https://www.youtube.com/playlist?list=PL8yHsr3EFj52Qf7lc3HHvHRdIysxEcj1H