Soft Matter Physics : An Introduction Introductions to solid state physics have ever since the initial book by F. Seitz in 1940 concentrated on simple crystals with few atoms per cell bonded together by strong ionic covalent or metallic bonds. References to weaker bonds such as van der Waals forces in rare gases or to geometric or chemical disorder (e.g. alloys or glasses) have been limited. The physical understanding of this eld started well before Seitz’s book and led to a number of Nobel prizes after the last war. Applications cover classical metallurgy el tronics geology and building materials as well as electrical and ionic transport chemical reactivity ferroelectricity and magnetism. But in parallel with this general and well publicized trend and sometimes earlier as far as physical concepts were concerned an exploration and increasingly systematic study of softer matter has developed through the twentieth century. More often in the hands of physical chemists and crystallographers than those of pure physicists the eld had for a long time a reputation of complexity. If progress in polymers was steady but slow interest in liquid crystals had lain dormant for forty years after a bright start lasting through 1925 to be revived in the late 1960s based on their possible use in imaging techniques. The optoelectronic properties of the eld in general are even more recent. Condensed Matter: General Characteristics the Chemical Bond and Particle Interactions Atomic and Molecular Arrangements The Order Parameter: Amplitude and Phase Phase Transitions Elasticity of Mesomorphic Phases Dynamics of Isotropic and Anisotropic Fluids Fractals and Growth Phenomena Dislocations in Solids. Plastic Relaxation Dislocations in Smectic and Columnar Phases Curvature Defects in Smectics and Columnar Phases Disclinations and Topological Point Defects. Fluid Relaxation. Topological Theory of Defects Surface Phenomena Stability of Colloidal Systems Polymers: Structural Properties.