Course Content (Syllabus)
Introduction. Classical solutions. Four important classes of partial differential equations: 1) First order equations, the method of characteristics. 2) The Laplace equation. The maximum principle, uniqueness of solutions. Mollifiers and smoothnes of harmonic functions. The fundamental solution, the Poisson formula, the Harnack estimate. 3) The heat equation. The maximum principle. The fundamental solution. The method of separation of variables, solutions via Fourier Series. 4) The wave equation. The method of energy, separation of variables, solutions via Fourier Series.