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Preface V
Note to the Reader XV
Analytic Functions 1
Complex Numbers 1
Motivation and Definitions 1
Triangle Inequalities 4
Polar Representation 4
Argument Function 5
Take Care with Multivalued Functions 8
Functions as Mappings 13
Mapping: w = e[superscript z] 14
Mapping: w = Sin[z] 16
Elementary Functions and Their Inverses 17
Exponential and Logarithm 17
Powers 18
Trigonometric and Hyperbolic Functions 19
Standard Branch Cuts 20
Sets, Curves, Regions and Domains 21
Limits and Continuity 22
Differentiability 23
Cauchy-Riemann Equations 23
Differentiation Rules 25
Properties of Analytic Functions 26
Cauchy-Goursat Theorem 28
Simply Connected Regions 28
Proof 28
Example 31
Cauchy Integral Formula 32
Integration Around Nonanalytic Regions 32
Cauchy Integral Formula 33
Example: Yukawa Field 34
Derivatives of Analytic Functions 36
Morera's Theorem 37
Complex Sequences and Series 37
Convergence Tests 37
Uniform Convergence 37
Derivatives and Taylor Series for Analytic Functions 41
Taylor Series 41
Cauchy Inequality 44
Liouville's Theorem 44
Fundamental Theorem of Algebra 44
Zeros of Analytic Functions 45
Laurent Series 45
Derivation 45
Example 47
Classification of Singularities 48
Poles and Residues 49
Meromorphic Functions 51
Pole Expansion 51
Example: Tan[z] 53
Product Expansion 54
Example: Sin[z] 54
Problems for Chapter 1 55
Integration 65
Introduction 65
Good Tricks 65
Parametric Differentiation 65
Convergence Factors 66
Contour Integration 66
Residue Theorem 66
Definite Integrals of the Form [Characters not reproducible] [sin [Theta], cos [Theta]] d[Theta] 67
Definite Integrals of the Form [Characters not reproducible] 69
Fourier Integrals 70
Custom Contours 72
Isolated Singularities on the Contour 73
Removable Singularity 73
Cauchy Principal Value 75
Integration Around a Branch Point 77
Reduction to Tabulated Integrals 79
Example: [Characters not reproducible] 80
Example: The Beta Function 81
Example: [Characters not reproducible] 81
Integral Representations for Analytic Functions 82
Using Mathematica to Evaluate Integrals 86
Symbolic Integration 86
Numerical Integration 88
Further Information 89
Problems for Chapter 2 89
Asymptotic Series 95
Introduction 95
Method of Steepest Descent 96
Example: Gamma Function 99
Partial Integration 101
Example: Complementary Error Function 102
Expansion of an Integrand 104
Example: Modified Bessel Function 105
Problems for Chapter 3 108
Generalized Functions 111
Motivation 111
Properties of the Dirac Delta Function 113
Other Useful Generalized Functions 115
Heaviside Step Function 115
Derivatives of the Dirac Delta Function 116
Green Functions 118
Multidimensional Delta Functions 120
Problems for Chapter 4 122
Integral Transforms 125
Introduction 125
Fourier Transform 126
Motivation 126
Definition and Inversion 128
Basic Properties 130
Parseval's Theorem 131
Convolution Theorem 132
Correlation Theorem 133
Useful Fourier Transforms 134
Fourier Transform of Derivatives 138
Summary 139
Green Functions via Fourier Transform 139
Example: Green Function for One-Dimensional Diffusion 139
Example: Three-Dimensional Green Function for Diffusion Equations 141
Example: Green Function for Damped Oscillator 143
Operator Method 147
Cosine or Sine Transforms for Even or Odd Functions 147
Discrete Fourier Transform 148
Sampling 149
Convolution 153
Temporal Correlation 156
Power Spectrum Estimation 160
Laplace Transform 165
Definition and Inversion 165
Laplace Transforms for Elementary Functions 167
Laplace Transform of Derivatives 170
Convolution Theorem 171
Summary 173
Green Functions via Laplace Transform 173
Example: Series RC Circuit 174
Example: Damped Oscillator 175
Example: Diffusion with Constant Boundary Value 176
Problems for Chapter 5 181
Analytic Continuation and Dispersion Relations 191
Analytic Continuation 191
Motivation 191
Uniqueness 192
Reflection Principle 194
Permanence of Algebraic Form 195
Example: Gamma Function 195
Dispersion Relations 196
Causality 196
Oscillator Model 200
Kramers-Kronig Relations 203
Sum Rules 205
Hilbert Transform 207
Spreading of a Wave Packet 208
Solitons 212
Problems for Chapter 6 216
Sturm-Liouville Theory 223
Introduction: The General String Equation 223
Hilbert Spaces 226
Schwartz Inequality 229
Gram-Schmidt Orthogonalization 230
Properties of Sturm-Liouville Systems 232
Self-Adjointness 232
Reality of Eigenvalues and Orthogonality of Eigenfunctions 233
Discreteness of Eigenvalues 235
Completeness of Eigenfunctions 235
Parseval's Theorem 237
Reality of Eigenfunctions 238
Interleaving of Zeros 238
Comparison Theorems 240
Green Functions 242
Interface Matching 242
Eigenfunction Expansion of Green Function 246
Example: Vibrating String 252
Perturbation Theory 253
Example: Bead at Center of a String 255
Variational Methods 256
Example: Vibrating String 259
Problems for Chapter 7 260
Legendre and Bessel Functions 269
Introduction 269
Legendre Functions 270
Generating Function for Legendre Polynomials 270
Series Representation and Rodrigues' Formula 274
Schlafli's Integral Representation 275
Legendre Expansion 275
Associated Legendre Functions 277
Spherical Harmonics 281
Multipole Expansion 282
Addition Theorem 283
Legendre Functions of the Second Kind 286
Relationship to Hypergeometric Functions 287
Analytic Structure of Legendre Functions 289
Bessel Functions 291
Cylindrical 291
Hankel Functions 297
Neumann Functions 299
Modified Bessel Functions 303
Spherical Bessel Functions 305
Fourier-Bessel Transform 308
Example: Fourier-Bessel Expansion of Nuclear Charge Density 311
Summary 312
Legendre Functions 313
Associated Legendre Functions 314
Spherical Harmonics 315
Cylindrical Bessel Functions 315
Spherical Bessel Functions 316
Fourier-Bessel Expansions 318
Problems for Chapter 8 318
Boundary-Value Problems 327
Introduction 327
Laplace's Equation in Box with Specified Potential on one Side 328
Green Function for Grounded Box 329
Green's Theorem for Electrostatics 332
Separable Coordinate Systems 335
Spherical Polar Coordinates 336
Cylindrical Coordinates 338
Spherical Expansion of Dirichlet Green Function for Poisson's Equation 339
Example: Multipole Expansion for Localized Charge Distribution 342
Example: Point Charge Near Grounded Conducting Sphere 342
Example: Specified Potential on Surface of Empty Sphere 344
Example: Charged Ring at Center of Grounded Conducting Sphere 346
Magnetic Field of Current Loop 346
Inhomogeneous Wave Equation 349
Spatial Representation of Time-Independent Green Function 349
Partial-Wave Expansion 352
Momentum Representation of Time-Independent Green Function 354
Retarded Green Function 356
Lippmann-Schwinger Equation 358
Problems for Chapter 9 360
Group Theory 369
Introduction 369
Finite Groups 370
Definitions 370
Equivalence Classes 373
Subgroups 374
Homomorphism 375
Direct Products 376
Representations 376
Definitions 376
Example: Vibrating triangle 380
Orthogonality Theorem 383
Character 388
Example: Character table for symmetries of a square 393
Example: Vibrational eigenvalues of square 397
Direct-Product Representations 400
Eigenfunctions 403
Wigner-Eckart Theorem 404
Continuous Groups 405
Definitions 405
Transformation of Functions 408
Generators 409
Example: Linear coordinate transformations in one dimension 413
Example: SO(2) 414
Example: SU(2) 416
Example: SO(3) 417
Total angular momentum 418
Transformation of Operators 419
Invariant Functions 420
Lie Algebra 422
Definitions 422
Example: SU(2) 423
Orthogonality Relations for Lie Groups 425
Quantum Mechanical Representations of the Rotation Group 428
Generators and Commutation Relations 428
Euler Parametrization 430
Homomorphism Between SU(2) and SO(3) 431
Irreducible Representations of SU(2) 433
Orthogonality Relations for Rotation Matrices 437
Coupling of Angular Momenta 438
Spherical Tensors 442
Unitary Symmetries in Nuclear and Particle Physics 445
Problems for Chapter 10 447
Bibliography 459
Index 461
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Add Graduate Mathematical Physics: With MATHEMATICA Supplements, This up-to-date textbook on mathematical methods of physics is designed for a one-semester graduate or two-semester advanced undergraduate course. The formal methods are supplemented by applications that use MATHEMATICA to perform both symbolic and numeri, Graduate Mathematical Physics: With MATHEMATICA Supplements to the inventory that you are selling on WonderClubX
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Add Graduate Mathematical Physics: With MATHEMATICA Supplements, This up-to-date textbook on mathematical methods of physics is designed for a one-semester graduate or two-semester advanced undergraduate course. The formal methods are supplemented by applications that use MATHEMATICA to perform both symbolic and numeri, Graduate Mathematical Physics: With MATHEMATICA Supplements to your collection on WonderClub |