The third edition (1879) of Dirichlet’s posthumously published 1856-7 lectures on number theory includes several famous proofs.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either…

These lectures by Dirichlet (1805-59) were published posthumously by his former colleague Richard Dedekind. They include Dirichlet’s famous proofs of the class number theorem for binary quadratic forms and the…

This is a reproduction of a book published before 1923. This book may have occasional imperfectionssuch as missing or blurred pages, poor pictures, errant marks, etc. that were either part…