For the most part, this book is the translation from Japanese of the earlier book written jointly by Koji Doi and the author who revised it substantially for the English edition. It sets out to provide the reader with the basic knowledge of elliptic modular forms necessary to understand the recent developments in number theory. The first part gives the general theory of modular groups, modular forms and Hecke operators, with emphasis on the Hecke-Weil theory of the relation between modular forms and Dirichlet series. The second part is on the unit groups of quaternion algebras, which are seldom dealt with in books. The so-called Eichler-Selberg trace formula of Hecke operators follows next and the explicit computable formula is given. In the last chapter, written for the English edition, Eisenstein series with parameter are discussed following the recent work of Shimura: Eisenstein series are likely to play a very important role in the future progress of number theory, and this chapter provides a good introduction to the topic.
Again the function field extension degree is p even though the Frobenius map is a bijection, and again the extension is generated by a pth root that repeats p times as the root of its minimal polynomial. Definition 8.2.2.
This book is a translation of the earlier book written by Koji Doi and the author, who revised it substantially for this English edition.
This is not just yet another introductory text to this theory, though it could certainly be used as such in conjunction with more traditional treatments.
From the reviews: "This book gives a thorough introduction to several theories that are fundamental to research on modular forms.
This book is an introduction to some of these problems, and an overview of the theories used nowadays to attack them, presented so that the number theory is always at the forefront of the discussion.
D. Goldfeld, J. Hoffstein and S. J. Patterson, On automorphic functions of half-integral weight with applications to elliptic curves. In: Number Theory Related to Fermat's Last Theorem, Birkhauser, 1982, 153–193.
16 The Classical Hecke Algebra In the arithmetic theory of elliptic modular forms Hecke operators play a pivotal role. They enable one to extract arithmetic information from the Fourier coefficients of a modular form: if f = XD, ...
Modular Forms on Half-Spaces of Quaternions
The book will thus be of interest to number theorists who wish to learn about p-adic modular forms, leading them rapidly to interesting research, and also to the specialists in the subject.
It has applications to and connections with manifold topology, number theory, and string theory. This book provides a careful, accessible introduction to topological modular forms.