Frontmatter -- Contents -- List of Symbols -- Chapter 1. Introduction -- Chapter 2. Scalar second order PDEs -- Chapter 3. High-order elliptic equations -- Chapter 4. Triangular systems of elliptic equations -- Chapter 5. Systems of elasticity theory -- Chapter 6. The generalized Poisson formula for the Lamé equation -- Chapter 7. Spherical means for the stress and strain tensors -- Chapter 8. Applications to the Random Walk on Spheres method -- Bibliographyweiterlesen