Complex Analysis - Maths KU

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vi Contents Chapter 4. Elementary Functions 175 4.1 Exponential and Logarithmic Functions 176 4.1.1 Complex Exponential Function 176 4.1.2 Complex Logarithmic Function 182 4.2 Complex Powers 194 4.3 Trigonometric and Hyperbolic Functions 200 4.3.1 Complex Trigonometric Functions 200 4.3.2 Complex Hyperbolic Functions 209 4.4 Inverse Trigonometric and Hyperbolic Functions 214 4.5 Applications 222 Chapter 4 Review Quiz 232 Chapter 5. Integration in the Complex Plane 235 5.1 Real Integrals 236 5.2 Complex Integrals 245 5.3 Cauchy-Goursat Theorem 256 5.4 Independence of Path 264 5.5 Cauchy’s Integral Formulas and Their Consequences 272 5.5.1 Cauchy’s Two Integral Formulas 273 5.5.2 Some Consequences of the Integral Formulas 277 5.6 Applications 284 Chapter 5 Review Quiz 297 Chapter 6. Series and Residues 301 6.1 Sequences and Series 302 6.2 Taylor Series 313 6.3 Laurent Series 324 6.4 Zeros and Poles 335 6.5 Residues and Residue Theorem 342 6.6 Some Consequences of the Residue Theorem 352 6.6.1 Evaluation of Real Trigonometric Integrals 352 6.6.2 Evaluation of Real Improper Integrals 354 6.6.3 Integration along a Branch Cut 361 6.6.4 The Argument Principle and Rouché’s Theorem 363 6.6.5 Summing Infinite Series 367 6.7 Applications 374 Chapter 6 Review Quiz 386
Contents vii Chapter 7. Conformal Mappings 389 7.1 Conformal Mapping 390 7.2 Linear Fractional Transformations 399 7.3 Schwarz-Christoffel Transformations 410 7.4 Poisson Integral Formulas 420 7.5 Applications 429 7.5.1 Boundary-Value Problems 429 7.5.2 Fluid Flow 437 Chapter 7 Review Quiz 448 Appendixes: I Proof of Theorem 2.1 APP-2 II Proof of the Cauchy-Goursat Theorem APP-4 III Table of Conformal Mappings APP-9 Answers for Selected Odd-Numbered Problems ANS-1 Index IND-1
Page 1 and 2: A First Course in Complex Analysis
Page 3: For Dana, Kasey, and Cody
Page 9 and 10: Preface 7.2 Preface Philosophy This
Page 11 and 12: Preface xi to, but not formally cov
Page 13 and 14: 3π 2π π 0 -π -2π -3π -1 0 1 -
Page 15 and 16: 1.1 Complex Numbers and Their Prope
Page 23 and 24: y z 2 z 2 - z 1 or (x 2 - x 1 , y 2
Page 25 and 26: 1.2 Complex Plane 13 From (8) with
Page 27 and 28: 1.2 Complex Plane 15 30. Find an up
Page 29 and 30: O y θ x = r cos θ (r, θ) or (x,
Page 31 and 32: 1.3 Polar Form of Complex Numbers 1
Page 33 and 34: 1.3 Polar Form of Complex Numbers 2
Page 35 and 36: 1.4 Powers and Roots 23 arg(z) =π/
Page 37 and 38: √ 4 = 2 and 3 √ 27 = 3 are the
Page 39 and 40: 1.4 Powers and Roots 27 16. Rework
Page 41 and 42: z 0 ρ ρ |z - z 0 |= Figure 1.15 C
Page 43 and 44: y Interior Exterior Boundary Figure
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Chapter 1 Review Quiz 45 Here the s
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Chapter 1 Review Quiz 47 27. The pr
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3i 2i i S 1 2 3 Image of a square u
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2.1 Complex Functions 51 interchang
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2.1 Complex Functions 53 Definition
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2.1 Complex Functions 55 respective
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2.1 Complex Functions 57 Focus on C
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2.2 Complex Functions as Mappings 5
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-4 -4 -3 C 2 3 4 (a) The vertical l
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4 2 -6 -4 -2 2 4 6 -2 -4 v Figure 2
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3i 2i i S z 1 2 3 S′ T(z) Figure
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ar Figure 2.12 Magnification C C′
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Note: The order in which you perfor
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2.3 Linear Mappings 75 triangle S4
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2.3 Linear Mappings 77 In Problems
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2.3 Linear Mappings 79 36. (a) Give
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2θ r θ r 2 Figure 2.17 The mappin
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-3 y 3 2 1 -2 -1 1 2 3 -1 -2 -3 (a)
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y 2 1.5 1 0.5 -2 -1.5 -1 -0.5 -0.5
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Note ☞ 2.4 Special Power Function
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Solve the equation z = f(w) for w t
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Remember: Arg(z) is in the interval
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S y (a) A circular sector 3π/8 v 3
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B y y A w = z 2 x (a) A maps onto A
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3π 2π π 0 -π -2π -3π -1 0 1 -
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2.4 Special Power Functions 99 43.
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z c(z) Figure 2.41 Complex conjugat
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w = 1/z Figure 2.43 The reciprocal
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2.5 Reciprocal Function 105 of the
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2.5 Reciprocal Function 107 underst
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2.5 Reciprocal Function 109 24. Acc
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L y y = L + ε y = L - ε y = f(x)
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2.6 Limits and Continuity 113 Crite
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2.6 Limits and Continuity 115 Befor
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2.6 Limits and Continuity 117 Theor
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2.6 Limits and Continuity 119 See (
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-1 y z = e iθ Figure 2.54 Figure f
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2.6 Limits and Continuity 123 It th
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2.6 Limits and Continuity 125 While
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y Values of arg decreasing Values o
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2.6 Limits and Continuity 129 In Pr
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2.6 Limits and Continuity 131 In Pr
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-4 -4 -3 -2 (-2, -1) 4 3 2 1 y -1 1
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Note: Normalized vector fields shou
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4 2 y -4 -2 2 4 -2 -4 Figure 2.63 S
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Chapter 2 Review Quiz 139 10. The l
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3 2 1 0 -1 -2 -3 -3 -2 -1 0 1 2 3 L
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3.1 Differentiability and Analytici
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☞ 3.1 Differentiability and Analy
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3.2 Cauchy-Riemann Equations 153 We
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3.2 Cauchy-Riemann Equations 155 EX
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3.2 Cauchy-Riemann Equations 157 EX
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3.3 Harmonic Functions 159 then sol
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3.3 Harmonic Functions 161 EXAMPLE
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3.3 Harmonic Functions 163 In Probl
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3.4 Applications 165 tangent is the
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Lines of force ψ = c2 Lower potent
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In Section 4.5, for purposes that w
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y a b φ = k 1 x φ = k 0 Figure 3.
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Chapter 3 Review Quiz 173 11. The C
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176 Chapter 4 Elementary Functions
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Normalized velocity vector field fo
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5.1 Real Integrals 237 3. Let �P
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y π t = gives 2 (0,4) C t = 0 give
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(-1, -1) y C (2, 8) x Figure 5.5 Gr
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5.1 Real Integrals 243 denotes the
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5.2 Complex Integrals 245 In Proble
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z 0 C z k * z 1 * z 2 * z 2 z 1 z k
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These properties are important in t
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5.2 Complex Integrals 251 Now in vi
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5.2 Complex Integrals 253 Proof It
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y 1 + i 1 Figure 5.21 Figure for Pr
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D C Figure 5.26 Simply connected do
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D D A C C (a) (b) B C 1 C 1 Figure
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C 1 C 1 C (a) C (b) Figure 5.31 Tri
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C C y Figure 5.34 Figure for Proble
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z 0 C 1 D z 1 C Figure 5.38 If f is
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5.4 Independence of Path 267 and z(
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Be careful when using Ln z as an an
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5.4 Independence of Path 271 (ii) I
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5.5 Cauchy’s Integral Formulas an
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3i -3i y Figure 5.44 Contour for Ex
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y i 0 C 2 C 1 Figure 5.45 Contour f
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5.6 Applications 285 A B A B A B (a
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5.6 Applications 287 Indeed, by rew
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Note ☞ 5.6 Applications 289 If yo
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-2 -1 2 1 -1 -2 y Figure 5.51 Zero
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-1 -0.5 1 0.5 -0.5 -1 y 0.5 Figure
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5.6 Applications 295 In Problems 5-
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C 1 y 2i C 2 -2 2 Figure 5.58 Figur
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Chapter 5 Review Quiz 299 � z 38.
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302 Chapter 6 Series and Residues y
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304 Chapter 6 Series and Residues Y
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306 Chapter 6 Series and Residues D
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308 Chapter 6 Series and Residues E
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310 Chapter 6 Series and Residues R
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312 Chapter 6 Series and Residues 3
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314 Chapter 6 Series and Residues I
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316 Chapter 6 Series and Residues D
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318 Chapter 6 Series and Residues N
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326 Chapter 6 Series and Residues a
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328 Chapter 6 Series and Residues N
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330 Chapter 6 Series and Residues T
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334 Chapter 6 Series and Residues R
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336 Chapter 6 Series and Residues i
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338 Chapter 6 Series and Residues A
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340 Chapter 6 Series and Residues S
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344 Chapter 6 Series and Residues T
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346 Chapter 6 Series and Residues (
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354 Chapter 6 Series and Residues H
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356 Chapter 6 Series and Residues -
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358 Chapter 6 Series and Residues o
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360 Chapter 6 Series and Residues -
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362 Chapter 6 Series and Residues z
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364 Chapter 6 Series and Residues f
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366 Chapter 6 Series and Residues v
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368 Chapter 6 Series and Residues
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378 Chapter 6 Series and Residues C
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380 Chapter 6 Series and Residues s
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386 Chapter 6 Series and Residues P
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390 Chapter 7 Conformal Mappings y
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394 Chapter 7 Conformal Mappings π
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396 Chapter 7 Conformal Mappings Re
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398 Chapter 7 Conformal Mappings 15
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400 Chapter 7 Conformal Mappings De
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402 Chapter 7 Conformal Mappings Th
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404 Chapter 7 Conformal Mappings v
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406 Chapter 7 Conformal Mappings Re
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408 Chapter 7 Conformal Mappings No
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412 Chapter 7 Conformal Mappings x
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414 Chapter 7 Conformal Mappings A
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416 Chapter 7 Conformal Mappings fo
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418 Chapter 7 Conformal Mappings EX
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420 Chapter 7 Conformal Mappings
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428 Chapter 7 Conformal Mappings (a
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436 Chapter 7 Conformal Mappings φ
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438 Chapter 7 Conformal Mappings ψ
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444 Chapter 7 Conformal Mappings In
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448 Chapter 7 Conformal Mappings In
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Appendixes 1
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Appendix II Proof of the Cauchy-Gou
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Integrals � � � FE , GF , EG
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Appendix I Proof of Theorem 2.1 APP
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Appendix III Table of Conformal Map
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Answers to Selected Odd-Numbered Pr
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Indexes 1
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Word Index IND-7 Convergence of an
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Word Index IND-5 Cauchy-Riemann equ
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Symbol Index IND-3 z α , 194 sin z
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Word Index IND-9 principal square r
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IND-14 Word Index partial sums of,
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IND-12 Word Index Partial fractions
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Word Index IND-15 mapping by, 206-2
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