Introduction to the Theory of Integrable Billiards: topological approach

<jats:p>The book contains a lectures of a special course on integrable systems and billiards read by authors at the Faculty of Mechanics and Mathematics of Lomonosov Moscow State University summary of a special course, read by the authors. It is based on the topological approach to such systems, developed by the scientific school of RAS member A. T. Fomenko. The lectures are provided with visual material, examples and exercises, are introductory and adapted for perception by junior students of mathematical specialties.</jats:p>