This lecture is part of my Berkeley math 115 course "Introduction to number theory"
For the other lectures in the course see • Introduction to number theory (Berkel...
We give an overview of the prime number theorem, stating that the number of primes less than x is about x/log x
Zagier's article about the proof: https://www.jstor.org/stable/2975232
The textbook is "An introduction to the theory of numbers" by Niven, Zuckerman, and Montgomery (5th edition).