| 1. First-order Partial Differential Equations |
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1 | (38) |
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1 | (3) |
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1.2. Linear First-order Equations |
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4 | (7) |
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1.3. The Cauchy Problem for First-order Quasi-linear Equations |
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11 | (12) |
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1.4. General Solutions of Quasi-linear Equations |
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23 | (5) |
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1.5. Fully-nonlinear First-order Equations |
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28 | (11) |
| 2. Second-order Partial Differential Equations |
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39 | (28) |
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39 | (7) |
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2.2. Classification and Canonical Forms of Equations in Two Independent Variables |
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46 | (13) |
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2.3. Classification of Almost-linear Equations in Rn |
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59 | (8) |
| 3. One Dimensional Wave Equation |
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67 | (30) |
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3.1. The Wave Equation on the Whole Line. D'Alembert Formula |
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67 | (11) |
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3.2. The Wave Equation on the Half-line. Reflection Method |
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78 | (6) |
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3.3. Mixed Problem for the Wave Equation |
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84 | (3) |
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3.4. Inhomogeneous Wave Equation |
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87 | (5) |
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3.5. Conservation of the Energy |
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92 | (5) |
| 4. One Dimensional Diffusion Equation |
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97 | (26) |
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4.1. Maximum-minimum Principle for the Diffusion Equation |
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97 | (6) |
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4.2. The Diffusion Equation on the Whole Line |
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103 | (12) |
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4.3. Diffusion on the Half-line |
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115 | (3) |
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4.4. Inhomogeneous Diffusion Equation on the Whole Line |
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118 | (5) |
| 5. Weak Solutions, Shock Waves and Conservation Laws |
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123 | (46) |
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5.1. Weak Derivatives and Weak Solutions |
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123 | (7) |
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130 | (10) |
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140 | (13) |
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5.4. Weak Solutions. Riemann Problem |
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153 | (9) |
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5.5. Discontinuous Solutions of Conservation Laws. Rankine-Hugoniot Condition |
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162 | (7) |
| 6. The Laplace Equation |
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169 | (30) |
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6.1. Harmonic Functions. Maximum-minimum Principle |
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169 | (4) |
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173 | (9) |
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182 | (3) |
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6.4. Green's Functions for a Half-space and Sphere |
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185 | (8) |
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6.5. Harnack's Inequalities and Theorems |
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193 | (6) |
| 7. Fourier Series and Fourier Method for PDEs |
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199 | (56) |
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199 | (18) |
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7.2. Orthonormal Systems. General Fourier Series |
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217 | (12) |
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7.3. Fourier Method for the Diffusion Equation |
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229 | (9) |
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7.4. Fourier Method for the Wave Equation |
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238 | (5) |
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7.5. Fourier Method for the Laplace Equation |
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243 | (12) |
| 8. Diffusion and Wave Equations in Higher Dimensions |
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255 | (32) |
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8.1. The Diffusion Equation in Three Dimensional Space |
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255 | (7) |
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8.2. Fourier Method for the Diffusion Equation in Higher Dimensions |
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262 | (7) |
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8.3. Kirchoff's Formula for the Wave Equation. Huygens' Principle |
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269 | (7) |
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8.4. Fourier Method for the Wave Equation on the Plane. Nodal Sets |
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276 | (11) |
| References |
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287 | (4) |
| Answers and Hints to Exercises |
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291 | (10) |
| Index |
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301 | |