This book tells the story of the Riemann hypothesis for function fields
(or curves) starting with Artin's 1921 thesis, covering Hasse's work in
the 1930s on elliptic fields and more, and concluding with Weil's final
proof in 1948. The main sources are letters which were exchanged among
the protagonists during that time, found in various archives, mostly the
University Library in Göttingen. The aim is to show how the ideas
formed, and how the proper notions and proofs were found, providing a
particularly well-documented illustration of how mathematics develops in
general. The book is written for mathematicians, but it does not require
any special knowledge of particular mathematical fields.