This is a volume of lecture notes based on three series of lectures given by visiting professors of RIMS, Kyoto University during the year-long project 'Discrete Geometric Analysis', which took place in the Japanese academic year 2012-2013. The aim of the project was to make comprehensive research on topics related to discreteness in geometry, analysis and optimization.Discrete geometric analysis is a hybrid field of several traditional disciplines, including graph theory, geometry, discrete group theory, and probability. The name of the area was coined by Toshikazu Sunada, and since being...