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Modular Functions and Dirichlet Series in Number Theory de Tom M. Apostol

Modular Functions and Dirichlet Series in Number Theory: Graduate Texts in Mathematics, cartea 41

Autor Tom M. Apostol
en Limba Engleză Paperback – 2 oct 2012

Notăm cu interes reeditarea acestui volum clasic, Modular Functions and Dirichlet Series in Number Theory, care cristalizează experiența pedagogică de peste un sfert de secol a lui Tom M. Apostol la Caltech. Această a doua ediție rafinează expunerea unor concepte fundamentale, menținând un echilibru între rigoarea matematică și accesibilitatea stilului, aspect confirmat de recenziile care laudă fluiditatea scriiturii autorului. Lucrarea este concepută ca o continuare firească a volumului Introduction to Analytic Number Theory, făcând trecerea de la bazele aritmetice la utilizarea instrumentelor analizei complexe în studiul numerelor. Structura volumului este riguros organizată, debutând cu studiul funcțiilor eliptice și al funcției p a lui Weierstrass, evoluând natural spre grupul modular și transformările Möbius. Un punct forte al textului îl reprezintă tratarea detaliată a aplicațiilor teoretice, precum seriile Rademacher pentru funcția de partiție și teoria lui Hecke privind formele întregi cu coeficienți Fourier multiplicativi. Comparabil cu Elliptic Functions de Komaravolu Chandrasekharan în ceea ce privește rigoarea, volumul lui Apostol se distinge prin accentul pus pe aspectele clasice și prin integrarea unor exerciții care ghidează studentul spre rezultate moderne. În contextul operei sale, dacă Mathematical Analysis stabilea fundamentele analitice, acest titlu demonstrează aplicabilitatea lor profundă în teoria numerelor. Putem afirma că lucrarea rămâne o referință solidă, oferind specialistului un repertoriu esențial de tehnici, iar studentului avansat o cale clară de acces spre cercetarea contemporană.

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Specificații

ISBN-13: 9781461269786
ISBN-10: 1461269784
Pagini: 220
Ilustrații: X, 207 p.
Dimensiuni: 155 x 235 x 13 mm
Greutate: 0.34 kg
Ediția:Second Edition 1990
Editura: Springer
Colecția Graduate Texts in Mathematics
Seria Graduate Texts in Mathematics

Locul publicării:New York, NY, United States

Public țintă

Graduate

De ce să citești această carte

Această lucrare este esențială pentru studenții de la nivel masteral sau doctoral care doresc să stăpânească legătura dintre analiza complexă și teoria numerelor. Cititorul câștigă o înțelegere profundă a funcțiilor modulare și a seriilor Dirichlet printr-o expunere clară, fundamentată pe decenii de predare la Caltech. Este recomandată celor care caută o abordare clasică, dar relevantă, a unor subiecte complexe precum teoria lui Hecke.

Descriere scurtă

This is the second volume of a 2-volume textbook* which evolved from a course (Mathematics 160) offered at the California Institute of Technology during the last 25 years. The second volume presupposes a background in number theory com­ parable to that provided in the first volume, together with a knowledge of the basic concepts of complex analysis. Most of the present volume is devoted to elliptic functions and modular functions with some of their number-theoretic applications. Among the major topics treated are Rademacher's convergent series for the partition function, Lehner's congruences for the Fourier coefficients of the modular functionj(r), and Hecke's theory of entire forms with multiplicative Fourier coefficients. The last chapter gives an account of Bohr's theory of equivalence of general Dirichlet series. Both volumes of this work emphasize classical aspects of a subject which in recent years has undergone a great deal of modern development. It is hoped that these volumes will help the nonspecialist become acquainted with an important and fascinating part of mathematics and, at the same time, will provide some of the background that belongs to the repertory of every specialist in the field. This volume, like the first, is dedicated to the students who have taken this course and have gone on to make notable contributions to number theory and other parts of mathematics. T.M.A. January, 1976 * The first volume is in the Springer-Verlag series Undergraduate Texts in Mathematics under the title Introduction to Analytic Number Theory.

Cuprins

1 Elliptic functions.- 1.1 Introduction.- 1.2 Doubly periodic functions.- 1.3 Fundamental pairs of periods.- 1.4 Elliptic functions.- 1.5 Construction of elliptic functions.- 1.6 The Weierstrass p function.- 1.7 The Laurent expansion of p near the origin.- 1.8 Differential equation satisfied by p.- 1.9 The Eisenstein series and the invariants g2 and g3.- 1.10 The numbers e1, e2, e3.- 1.11 The discriminant ?.- 1.12 Klein’s modular function J(?).- 1.13 Invariance of J under unimodular transformations.- 1.14 The Fourier expansions of g2(?) and g3(?).- 1.15 The Fourier expansions of ?(?) and J(?).- Exercises for Chapter 1.- 2 The Modular group and modular functions.- 2.1 Möbius transformations.- 2.2 The modular group ?.- 2.3 Fundamental regions.- 2.4 Modular functions.- 2.5 Special values of J.- 2.6 Modular functions as rational functions of J.- 2.7 Mapping properties of J.- 2.8 Application to the inversion problem for Eisenstein series.- 2.9 Application to Picard’s theorem.- Exercises for Chapter 2.- 3 The Dedekind eta function.- 3.1 Introduction.- 3.2 Siegel’s proof of Theorem 3.1.- 3.3 Infinite product representation for ?(?).- 3.4 The general functional equation for ?(?).- 3.5 Iseki’s transformation formula.- 3.6 Deduction of Dedekind’s functional equation from Iseki’s formula.- 3.7 Properties of Dedekind sums.- 3.8 The reciprocity law for Dedekind sums.- 3.9 Congruence properties of Dedekind sums.- 3.10 The Eisenstein series G2(?).- Exercises for Chapter 3.- 4 Congruences for the coefficients of the modular function j.- 4.1 Introduction.- 4.2 The subgroup ?0(q).- 4.3 Fundamental region of ?0(p).- 4.4 Functions automorphic under the subgroup ?0(p).- 4.5 Construction of functions belonging to ?0(p).- 4.6 The behavior of fp under thegenerators of ?.- 4.7 The function ?(?) = ?(q?)/?(?).- 4.8 The univalent function ?(?).- 4.9 Invariance of ?(?) under transformations of ?0(q).- 4.10 The function jp expressed as a polynomial in ?.- Exercises for Chapter 4.- 5 Rademacher’s series for the partition function.- 5.1 Introduction.- 5.2 The plan of the proof.- 5.3 Dedekind’s functional equation expressed in terms of F.- 5.4 Farey fractions.- 5.5 Ford circles.- 5.6 Rademacher’s path of integration.- 5.7 Rademacher’s convergent series for p(n).- Exercises for Chapter 5.- 6 Modular forms with multiplicative coefficients.- 6.1 Introduction.- 6.2 Modular forms of weight k.- 6.3 The weight formula for zeros of an entire modular form.- 6.4 Representation of entire forms in terms of G4 and G6.- 6.5 The linear space Mk and the subspace Mk,0.- 6.6 Classification of entire forms in terms of their zeros.- 6.7 The Hecke operators Tn.- 6.8 Transformations of order n.- 6.9 Behavior of Tnf under the modular group.- 6.10 Multiplicative property of Hecke operators.- 6.11 Eigenfunctions of Hecke operators.- 6.12 Properties of simultaneous eigenforms.- 6.13 Examples of normalized simultaneous eigenforms.- 6.14 Remarks on existence of simultaneous eigenforms in M2k,0.- 6.15 Estimates for the Fourier coefficients of entire forms.- 6.16 Modular forms and Dirichlet series.- Exercises for Chapter 6.- 7 Kronecker’s theorem with applications.- 7.1 Approximating real numbers by rational numbers.- 7.2 Dirichlet’s approximation theorem.- 7.3 Liouville’s approximation theorem.- 7.4 Kronecker’s approximation theorem: the one-dimensional case.- 7.5 Extension of Kronecker’s theorem to simultaneous approximation.- 7.6 Applications to the Riemann zeta function.- 7.7 Applications to periodic functions.- Exercisesfor Chapter 7.- 8 General Dirichlet series and Bohr’s equivalence theorem.- 8.1 Introduction.- 8.2 The half-plane of convergence of general Dirichlet series.- 8.3 Bases for the sequence of exponents of a Dirichlet series.- 8.4 Bohr matrices.- 8.5 The Bohr function associated with a Dirichlet series.- 8.6 The set of values taken by a Dirichlet series f(s) on a line ? = ?0.- 8.7 Equivalence of general Dirichlet series.- 8.8 Equivalence of ordinary Dirichlet series.- 8.9 Equality of the sets Uf(?0) and Ug(?0) for equivalent Dirichlet series.- 8.10 The set of values taken by a Dirichlet series in a neighborhood of the line ? = ?0.- 8.11 Bohr’s equivalence theorem.- 8.12 Proof of Theorem 8.15.- 8.13 Examples of equivalent Dirichlet series. Applications of Bohr’s theorem to L-series.- 8.14 Applications of Bohr’s theorem to the Riemann zeta function.- Exercises for Chapter 8.- Supplement to Chapter 3.- Index of special symbols.- Index 201.

Recenzii

From the reviews of the second edition:
“Apostol is an excellent writer of mathematics and the topics that are covered in this book are covered thoroughly in a concise, precise manner. … the writing is characterized by its easy, readable, fluid style. Each chapter is complemented with a nice set of exercises.” (Álvaro Lozano-Robledo, The Mathematical Association of America, June, 2011)