Quadratic Number Fields

Author : Franz Lemmermeyer
Publisher : Springer Nature
Page : 348 pages
File Size : 53,9 Mb
Release : 2021-09-18
Category : Mathematics
ISBN : 9783030786526

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Quadratic Number Fields by Franz Lemmermeyer Pdf

This undergraduate textbook provides an elegant introduction to the arithmetic of quadratic number fields, including many topics not usually covered in books at this level. Quadratic fields offer an introduction to algebraic number theory and some of its central objects: rings of integers, the unit group, ideals and the ideal class group. This textbook provides solid grounding for further study by placing the subject within the greater context of modern algebraic number theory. Going beyond what is usually covered at this level, the book introduces the notion of modularity in the context of quadratic reciprocity, explores the close links between number theory and geometry via Pell conics, and presents applications to Diophantine equations such as the Fermat and Catalan equations as well as elliptic curves. Throughout, the book contains extensive historical comments, numerous exercises (with solutions), and pointers to further study. Assuming a moderate background in elementary number theory and abstract algebra, Quadratic Number Fields offers an engaging first course in algebraic number theory, suitable for upper undergraduate students.

Author : Mak Trifković
Publisher : Springer Science & Business Media
Page : 206 pages
File Size : 50,5 Mb
Release : 2013-09-14
Category : Mathematics
ISBN : 9781461477174

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Algebraic Theory of Quadratic Numbers by Mak Trifković Pdf

By focusing on quadratic numbers, this advanced undergraduate or master’s level textbook on algebraic number theory is accessible even to students who have yet to learn Galois theory. The techniques of elementary arithmetic, ring theory and linear algebra are shown working together to prove important theorems, such as the unique factorization of ideals and the finiteness of the ideal class group. The book concludes with two topics particular to quadratic fields: continued fractions and quadratic forms. The treatment of quadratic forms is somewhat more advanced than usual, with an emphasis on their connection with ideal classes and a discussion of Bhargava cubes. The numerous exercises in the text offer the reader hands-on computational experience with elements and ideals in quadratic number fields. The reader is also asked to fill in the details of proofs and develop extra topics, like the theory of orders. Prerequisites include elementary number theory and a basic familiarity with ring theory.

Author : Hatice Boylan
Publisher : Springer
Page : 150 pages
File Size : 48,5 Mb
Release : 2014-12-05
Category : Mathematics
ISBN : 9783319129167

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Jacobi Forms, Finite Quadratic Modules and Weil Representations over Number Fields by Hatice Boylan Pdf

The new theory of Jacobi forms over totally real number fields introduced in this monograph is expected to give further insight into the arithmetic theory of Hilbert modular forms, its L-series, and into elliptic curves over number fields. This work is inspired by the classical theory of Jacobi forms over the rational numbers, which is an indispensable tool in the arithmetic theory of elliptic modular forms, elliptic curves, and in many other disciplines in mathematics and physics. Jacobi forms can be viewed as vector valued modular forms which take values in so-called Weil representations. Accordingly, the first two chapters develop the theory of finite quadratic modules and associated Weil representations over number fields. This part might also be interesting for those who are merely interested in the representation theory of Hilbert modular groups. One of the main applications is the complete classification of Jacobi forms of singular weight over an arbitrary totally real number field.

Author : J. L. Lehman
Publisher : American Mathematical Soc.
Page : 394 pages
File Size : 47,5 Mb
Release : 2019-02-13
Category : Algebraic fields
ISBN : 9781470447373

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Quadratic Number Theory: An Invitation to Algebraic Methods in the Higher Arithmetic by J. L. Lehman Pdf

Quadratic Number Theory is an introduction to algebraic number theory for readers with a moderate knowledge of elementary number theory and some familiarity with the terminology of abstract algebra. By restricting attention to questions about squares the author achieves the dual goals of making the presentation accessible to undergraduates and reflecting the historical roots of the subject. The representation of integers by quadratic forms is emphasized throughout the text. Lehman introduces an innovative notation for ideals of a quadratic domain that greatly facilitates computation and he uses this to particular effect. The text has an unusual focus on actual computation. This focus, and this notation, serve the author's historical purpose as well; ideals can be seen as number-like objects, as Kummer and Dedekind conceived of them. The notation can be adapted to quadratic forms and provides insight into the connection between quadratic forms and ideals. The computation of class groups and continued fraction representations are featured—the author's notation makes these computations particularly illuminating. Quadratic Number Theory, with its exceptionally clear prose, hundreds of exercises, and historical motivation, would make an excellent textbook for a second undergraduate course in number theory. The clarity of the exposition would also make it a terrific choice for independent reading. It will be exceptionally useful as a fruitful launching pad for undergraduate research projects in algebraic number theory.

Author : Richard A. Mollin
Publisher : CRC Press
Page : 378 pages
File Size : 51,7 Mb
Release : 2018-04-27
Category : Computers
ISBN : 9781351420761

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Quadratics by Richard A. Mollin Pdf

The first thing you will find out about this book is that it is fun to read. It is meant for the browser, as well as for the student and for the specialist wanting to know about the area. The footnotes give an historical background to the text, in addition to providing deeper applications of the concept that is being cited. This allows the browser to look more deeply into the history or to pursue a given sideline. Those who are only marginally interested in the area will be able to read the text, pick up information easily, and be entertained at the same time by the historical and philosophical digressions. It is rich in structure and motivation in its concentration upon quadratic orders. This is not a book that is primarily about tables, although there are 80 pages of appendices that contain extensive tabular material (class numbers of real and complex quadratic fields up to 104; class group structures; fundamental units of real quadratic fields; and more!). This book is primarily a reference book and graduate student text with more than 200 exercises and a great deal of hints! The motivation for the text is best given by a quote from the Preface of Quadratics: "There can be no stronger motivation in mathematical inquiry than the search for truth and beauty. It is this author's long-standing conviction that number theory has the best of both of these worlds. In particular, algebraic and computational number theory have reached a stage where the current state of affairs richly deserves a proper elucidation. It is this author's goal to attempt to shine the best possible light on the subject."

Author : David Hilbert
Publisher : Springer Science & Business Media
Page : 360 pages
File Size : 49,9 Mb
Release : 2013-03-14
Category : Mathematics
ISBN : 9783662035450

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The Theory of Algebraic Number Fields by David Hilbert Pdf

A translation of Hilberts "Theorie der algebraischen Zahlkörper" best known as the "Zahlbericht", first published in 1897, in which he provides an elegantly integrated overview of the development of algebraic number theory up to the end of the nineteenth century. The Zahlbericht also provided a firm foundation for further research in the theory, and can be seen as the starting point for all twentieth century investigations into the subject, as well as reciprocity laws and class field theory. This English edition further contains an introduction by F. Lemmermeyer and N. Schappacher.

Author : M. Ishida
Publisher : Springer
Page : 123 pages
File Size : 45,5 Mb
Release : 2006-12-08
Category : Mathematics
ISBN : 9783540375531

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The Genus Fields of Algebraic Number Fields by M. Ishida Pdf

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Author : David A. Cox
Publisher : John Wiley & Sons
Page : 372 pages
File Size : 47,5 Mb
Release : 2011-10-24
Category : Mathematics
ISBN : 9781118031001

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Primes of the Form x2 + ny2 by David A. Cox Pdf

Modern number theory began with the work of Euler and Gauss to understand and extend the many unsolved questions left behind by Fermat. In the course of their investigations, they uncovered new phenomena in need of explanation, which over time led to the discovery of field theory and its intimate connection with complex multiplication. While most texts concentrate on only the elementary or advanced aspects of this story, Primes of the Form x2 + ny2 begins with Fermat and explains how his work ultimately gave birth to quadratic reciprocity and the genus theory of quadratic forms. Further, the book shows how the results of Euler and Gauss can be fully understood only in the context of class field theory. Finally, in order to bring class field theory down to earth, the book explores some of the magnificent formulas of complex multiplication. The central theme of the book is the story of which primes p can be expressed in the form x2 + ny2. An incomplete answer is given using quadratic forms. A better though abstract answer comes from class field theory, and finally, a concrete answer is provided by complex multiplication. Along the way, the reader is introduced to some wonderful number theory. Numerous exercises and examples are included. The book is written to be enjoyed by readers with modest mathematical backgrounds. Chapter 1 uses basic number theory and abstract algebra, while chapters 2 and 3 require Galois theory and complex analysis, respectively.

Author : Fred Wayne Dodd
Publisher : Unknown
Page : 168 pages
File Size : 42,7 Mb
Release : 1983
Category : Number theory
ISBN : UCAL:B4178432

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Number Theory in the Quadratic Field with Golden Section Unit by Fred Wayne Dodd Pdf

Author : Daniel A. Marcus
Publisher : Springer
Page : 203 pages
File Size : 52,7 Mb
Release : 2018-07-05
Category : Mathematics
ISBN : 9783319902333

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Number Fields by Daniel A. Marcus Pdf

Requiring no more than a basic knowledge of abstract algebra, this text presents the mathematics of number fields in a straightforward, pedestrian manner. It therefore avoids local methods and presents proofs in a way that highlights the important parts of the arguments. Readers are assumed to be able to fill in the details, which in many places are left as exercises.

Author : Kalyan Chakraborty,Azizul Hoque,Prem Prakash Pandey
Publisher : Springer Nature
Page : 182 pages
File Size : 50,7 Mb
Release : 2020-01-17
Category : Mathematics
ISBN : 9789811515149

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Class Groups of Number Fields and Related Topics by Kalyan Chakraborty,Azizul Hoque,Prem Prakash Pandey Pdf

This book gathers original research papers and survey articles presented at the “International Conference on Class Groups of Number Fields and Related Topics,” held at Harish-Chandra Research Institute, Allahabad, India, on September 4–7, 2017. It discusses the fundamental research problems that arise in the study of class groups of number fields and introduces new techniques and tools to study these problems. Topics in this book include class groups and class numbers of number fields, units, the Kummer–Vandiver conjecture, class number one problem, Diophantine equations, Thue equations, continued fractions, Euclidean number fields, heights, rational torsion points on elliptic curves, cyclotomic numbers, Jacobi sums, and Dedekind zeta values. This book is a valuable resource for undergraduate and graduate students of mathematics as well as researchers interested in class groups of number fields and their connections to other branches of mathematics. New researchers to the field will also benefit immensely from the diverse problems discussed. All the contributing authors are leading academicians, scientists, researchers, and scholars.

Author : Frans Keune
Publisher : Radboud University Press
Page : 587 pages
File Size : 47,9 Mb
Release : 2023-03-27
Category : Mathematics
ISBN : 9789493296039

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Number Fields by Frans Keune Pdf

Number Fields is a textbook for algebraic number theory. It grew out of lecture notes of master courses taught by the author at Radboud University, the Netherlands, over a period of more than four decades. It is self-contained in the sense that it uses only mathematics of a bachelor level, including some Galois theory. Part I of the book contains topics in basic algebraic number theory as they may be presented in a beginning master course on algebraic number theory. It includes the classification of abelian number fields by groups of Dirichlet characters. Class field theory is treated in Part II: the more advanced theory of abelian extensions of number fields in general. Full proofs of its main theorems are given using a ‘classical’ approach to class field theory, which is in a sense a natural continuation of the basic theory as presented in Part I. The classification is formulated in terms of generalized Dirichlet characters. This ‘ideal-theoretic’ version of class field theory dates from the first half of the twentieth century. In this book, it is described in modern mathematical language. Another approach, the ‘idèlic version’, uses topological algebra and group cohomology and originated halfway the last century. The last two chapters provide the connection to this more advanced idèlic version of class field theory. The book focuses on the abstract theory and contains many examples and exercises. For quadratic number fields algorithms are given for their class groups and, in the real case, for the fundamental unit. New concepts are introduced at the moment it makes a real difference to have them available.

Author : Gerald J. Janusz
Publisher : American Mathematical Soc.
Page : 288 pages
File Size : 50,7 Mb
Release : 1996
Category : Algebraic fields
ISBN : 9780821804292

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Algebraic Number Fields by Gerald J. Janusz Pdf

This text presents the basic information about finite dimensional extension fields of the rational numbers, algebraic number fields, and the rings of algebraic integers in them. The important theorems regarding the units of the ring of integers and the class group are proved and illustrated with many examples given in detail. The completion of an algebraic number field at a valuation is discussed in detail and then used to provide economical proofs of global results. The book contains many concrete examples illustrating the computation of class groups, class numbers, and Hilbert class fields. Exercises are provided to indicate applications of the general theory.

Author : Michael Rosen
Publisher : Springer Science & Business Media
Page : 355 pages
File Size : 44,7 Mb
Release : 2013-04-18
Category : Mathematics
ISBN : 9781475760460

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Number Theory in Function Fields by Michael Rosen Pdf

Early in the development of number theory, it was noticed that the ring of integers has many properties in common with the ring of polynomials over a finite field. The first part of this book illustrates this relationship by presenting analogues of various theorems. The later chapters probe the analogy between global function fields and algebraic number fields. Topics include the ABC-conjecture, Brumer-Stark conjecture, and Drinfeld modules.

Author : Tsit-Yuen Lam
Publisher : Addison-Wesley
Page : 344 pages
File Size : 44,8 Mb
Release : 1980
Category : Mathematics
ISBN : 0805356665

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The Algebraic Theory of Quadratic Forms by Tsit-Yuen Lam Pdf