# xyz

## xyz軟體王

This is the continuous course of Partial Differential Equations (I).This is the GRADUATE level partial differential equation. We will focus on the relation between mathematics and physics and show the students how to understand PDEs intuitively.

* Fritz John, Partial Differential Equations (4th Edition), Applied Mathematical Sciences Vol.1 Springer-Verlag 1982.
* A. Pazy, Semigroups of Linear Operators and Applications to Partial Differential Equations, Springer-Verlag, 1983

5-1 The Wave Equation in n-Dimensional Space
(1) The method of sphereical means
(2) Hadmards method of descent
(3) Duhamels principle and the general Cauchy problem
(4) mixed problem
5-2 Higher-Order Hyperbolic Equations with Constant Coefficients
(1) Standard form of the initial-value problem
(2) solution by Fourier transform,
(3) solution of a mixed problem by Fourier transform
5-3 Symmetric Hyperbolic System
(1) The basic energy inequality
(2)Finite difference method
(3) Schauder method

6-1 The Fundamental Solution for Odd n Travelling wave
6-2 The Dirichlet Problem Lax-Milgram theorem, Garding inequality
6-3 Sobolev Space Weak solution and Hibert space

7-1 The Heat Equation Self-Similarity, Heat kernel, maximum principle
7-2 The Initial-Value Problem for General Second-Order Parabolic Equations
(1) Finite difference and maximum principle
(2) Existence of Initial Value Problem

8-1 Brief introduction of Functional Analysis Hilbert and Banach spaces, projection theorem, Leray-Schauder theorem
8-2 Semigroups of linear operator Generation, representation and spectral properties
8-3 Perturbations and Approximations The Trotter theorem
8-4 The abstract Cauchy Problem Basic theory
8-5 Application to linear partial differential equations Parabolic equation, Wave equation and Schrodinger equation
8-6 Applications to nonlinear partial differential equations KdV equation, nonlinear heat equation, nonmlinear Schrodinger equation