Introductionary Course on Solid State Theory Prof. H. Fehske, Spring School 2003 Hanoi, March 3-7 Lectures A Fundamentals B One-Electron Model C Electron-electron Interaction: Plasmons D Spin-Spin Interaction: Magnons E Ion-Ion Interaction: Phonons F Electron-Phonon-Interaction G Superconductivity Exercises E1 Hartree- & Hartree-Fock Approximations E2 Second Quantization E3 Sommerfeld Expansion E4 Tight-Binding Method E5 Hubbard Model E6 Gutzwiller Approach E7 SDW Approximation E8 Diatomic Chain E9 Thermodynamics of Lattice Vibrations E10 Meissner-Ochsenfeld Effect