Functions of a Complex Variable

Portada
Ginn, 1914 - 583 páginas
A thorough treatment of fundamental elements, concepts, and theorems pertaining to the function of a complex variable, this rigorous treatment is suitable for advanced mathematics students, physicists, and engineers. 1914 edition.
 

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Índice

Absolute Convergence
58
Introduction and Definitions 32 Addition and Subtraction
59
Multiplication
60
Cauchys Paradox
62
3536 Associative and Commutative Properties
64
Riemann on Simply Convergent Series 56 58 59 60 62 69 64
69
POWER SERIES
71
Introduction 39 Circle of Convergence 40 TwoWay Series 41 Double Series
77
Row and Column Series
80
Application to Power Series
84
CHAPTER IV
86
ཆཧྨརྒྱ ༣ ༤ 100 32a 52 Study of V
98
One and ManyValued Functions
100
EXPONENTIAL FUNCTION 54 Addition Theorem
102
Eulers Formula
106
Period of ez
108
Graphical Study of e
109
ARTICLES PAGE 58 Addition Theorem
111
Zeros and Periodicity
116
Graphical Study of sin z
117
Hyperbolic Functions
118
Logarithmic Function
123
Inverse Circular Functions
125
CHAPTER V
129
6768 Limits
131
Continuity
134
Geometric Terms
138
Uniform Continuity
139
Differentiation
140
Law of Mean
143
Elementary Properties
146
Surface Integrals
149
Curvilinear Integrals
150
7779 Illustrations from Physics
153
Stokes Theorem
158
CHAPTER VI
163
Definition of a Function of z
164
Limits Continuity
167
Elementary Theorems in Differentiation
170
Differentiation of Power Series
175
ARTICLES PAGE 87 Derivatives of Elementary Functions
176
Inverse Functions
178
Function of a Function
181
Functions having a Derivative
183
Definition
186
Properties of Integrals
187
Fundamental Theorem
189
Examples
190
The Indefinite Integral
192
Change of Variable
193
Integration by Parts
195
Differentiation with Respect to a Parameter
196
FUNCTIONS DEFINED BY SERIES 99 Steady Convergence
197
Continuity of Series
200
Termwise Integration
202
Calculation of π
205
Termwise Differentiation
206
vii
210
Zeros and Poles
237
Development of f0 4 in Terms of the
239
Essentially Singular Points
244
Point at Infinity
247
Integral Rational Functions
249
Rational Functions
251
Transcendental Functions
253
Residues
256
Inversion of a Power Series
259
Fouriers Development
262
INFINITE PRODUCTS
266
n m
290
CHAPTER IX
295
LINEAR DIFFERENTIAL EQUATIONS
329
CHAPTER X
333
The w N 92
369
CHAPTER XI
383
183184
399
186
409
Introduction
416
188
417
CHAPTER XII
423
Zeros of the
429
196
437
Relation between σs and
450
PAGE
453
Existence Theorem
455
207208 Fundamental Systems
459
Simple Singular Points
462
Integral Relations between P and
463
Hypergeometric Equation
466
Bessels Equation
469
Logarithmic Case
470
Method of Frobenius
474
Logarithmic Case of Hypergeometric Equation
476
Logarithmic Case of Bessels Equation
480
Regular Points 218 Equations of the Fuchsian Class 219 Fα B y z as an Integral 220 Loop Integrals 483 484
486
FUNCTIONS OF LEGENDRE AND LAPLACE 221 The Potential
493
Legendres Coefficients
495
Development of Pm in Multiple Angles 224 Differential Equation for P₂
498
Integral Properties of P
499
Rodrigues Formula
502
Development of fx in Terms of the P 228 Recurrent Relations
505
229231 Legendres Functions of the Second Kind
506
Laplaces Equation Au 0
508
Theorems of Gauss and Green
511
Potential expressed in Terms of Boundary Values
513
235
516
Spherical Harmonics
521
CHAPTER XV
533
The Roots of Jm
539
Other Loop Integrals for
545
Asymptotic Development of
552
Confocal Quadrics
561
Relations between Y and the P 493 495 497 498 499 502
582
524
583
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Página 12 - Thus, the modulus of the quotient is the quotient of the moduli and the argument of the quotient is obtained by subtracting the argument of the denominator from that of the numerator...
Página 522 - Hence the required formulas are x = r sin в cos ф, у = r sin в sin ф, z =r cos в.
Página 255 - A polynomial in .x and y is the sum of a finite number of terms of the type...
Página 517 - In the case of the sphere these are x = r sin 6 cos $ , y = r sin 0 sin <f> , z = r cos 0.
Página 494 - ... x = r sin 6 cos <f>, y — r sin 6 sin <f>, z = r cos 6.
Página 53 - ~TTF+' 1.2.8 ' and 5 therefore diverges in this case. To sum up, we have the theorem : The binomial series 1) converges absolutely for x < 1, and diverges for \x\ > 1. When x= 1, it converges for p > — 1 and diverges for fj, < — 1 ; it converges absolutely only for fj,> 0.
Página 469 - The only singular point in the finite part of the plane is x = 0. Let us consider the integrals of 1) for this point. The equation is already in the normal form. Here The indicial equation for x = 0 is therefore /0(r)= - w2 + r + r(r- 1)= 0, /0(r)=»*-ro

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