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Algorithms and Computation in Mathematics

Binary Quadratic Forms

An Algorithmic Approach

Authors: Buchmann, Johannes, Vollmer, Ulrich

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eBook 89,24 €
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  • ISBN 978-3-540-46368-9
  • Digitally watermarked, DRM-free
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Hardcover 109,19 €
price for Spain (gross)
  • ISBN 978-3-540-46367-2
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  • Usually dispatched within 3 to 5 business days.
  • The final prices may differ from the prices shown due to specifics of VAT rules
Softcover 109,19 €
price for Spain (gross)
  • ISBN 978-3-642-07971-9
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
  • The final prices may differ from the prices shown due to specifics of VAT rules
About this book

This book deals with algorithmic problems concerning binary quadratic forms 2 2 f(X,Y)= aX +bXY +cY with integer coe?cients a, b, c, the mathem- ical theories that permit the solution of these problems, and applications to cryptography. A considerable part of the theory is developed for forms with real coe?cients and it is shown that forms with integer coe?cients appear in a natural way. Much of the progress of number theory has been stimulated by the study of concrete computational problems. Deep theories were developed from the classic time of Euler and Gauss onwards to this day that made the solutions ofmanyof theseproblemspossible.Algorithmicsolutionsandtheirproperties became an object of study in their own right. Thisbookintertwinestheexpositionofoneveryclassicalstrandofnumber theory with the presentation and analysis of algorithms both classical and modern which solve its motivating problems. This algorithmic approach will lead the reader, we hope, not only to an understanding of theory and solution methods, but also to an appreciation of the e?ciency with which solutions can be reached. The computer age has led to a marked advancement of algorithmic - search. On the one hand, computers make it feasible to solve very hard pr- lems such as the solution of Pell equations with large coe?cients. On the other, the application of number theory in public-key cryptography increased the urgency for establishing the complexity of several computational pr- lems: many a computer system stays only secure as long as these problems remain intractable.

About the authors


Buchmann: Professor of Computer Science and Mathematics
   special areas number theory, computer algebra, cryptography
   associate editor Journal of Cryptology
          Leibniz Award of the Deutsche Forschungsgemeinschaft
   Author of "Introduction to cryptography" UTM, translated into seven languages
          Member of Berlin-Brandenburg Academy of Sciences
          Member of Academy of Sciences and Literature, Mainz

Vollmer: Thesis and several articles on algorithms for Class Group and Regulator computation in quadratic fields.

Reviews

From the reviews:

"Quadratic Field Theory is the best platform for the development of a computer viewpoint. Such an idea is not dominant in earlier texts on quadratic forms … . this book reads like a continuous program with major topics occurring as subroutines. The theory appears as ‘program comments,’ accompanied by numerical examples. … An appendix explaining linear algebra (bases and matrices) helps make this work ideal as a self-contained well-motivated textbook for computer-oriented students at any level and as a reference book." (Harvey Cohn, Zentralblatt MATH, Vol. 1125 (2), 2008)

“The book under discussion contains the classical Gauß -Dirichlet representation theory of integral binary quadric forms. … Many of the algorithms presented in this book are described in full detail. The whole text is very carefully written. It is therefore also well suited for beginners as in addition no special knowledge on Number Theory is necessary to understand the text. It can also be recommended to teachers who give courses in Number Theory or Computational Algebra.” (J. Schoissengeier, Monatshefte für Mathematik, Vol. 156 (3), March, 2009)


Table of contents (4 chapters)

  • Binary Quadratic Forms

    Johannes Buchmann, Ulrich Vollmer

    Pages 9-20

    Preview Buy Chapter 30,19 €
  • Constructing Forms

    Johannes Buchmann, Ulrich Vollmer

    Pages 35-56

    Preview Buy Chapter 30,19 €
  • Reduction of Indefinite Forms

    Johannes Buchmann, Ulrich Vollmer

    Pages 107-142

    Preview Buy Chapter 30,19 €
  • Multiplicative Lattices

    Johannes Buchmann, Ulrich Vollmer

    Pages 143-156

    Preview Buy Chapter 30,19 €

Buy this book

eBook 89,24 €
price for Spain (gross)
  • ISBN 978-3-540-46368-9
  • Digitally watermarked, DRM-free
  • Included format: PDF
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
Hardcover 109,19 €
price for Spain (gross)
  • ISBN 978-3-540-46367-2
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
  • The final prices may differ from the prices shown due to specifics of VAT rules
Softcover 109,19 €
price for Spain (gross)
  • ISBN 978-3-642-07971-9
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
  • The final prices may differ from the prices shown due to specifics of VAT rules
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Bibliographic Information

Bibliographic Information
Book Title
Binary Quadratic Forms
Book Subtitle
An Algorithmic Approach
Authors
Series Title
Algorithms and Computation in Mathematics
Series Volume
20
Copyright
2007
Publisher
Springer-Verlag Berlin Heidelberg
Copyright Holder
Springer-Verlag Berlin Heidelberg
eBook ISBN
978-3-540-46368-9
DOI
10.1007/978-3-540-46368-9
Hardcover ISBN
978-3-540-46367-2
Softcover ISBN
978-3-642-07971-9
Series ISSN
1431-1550
Edition Number
1
Number of Pages
XIV, 318
Topics