Since his death in 1996, many scientific meetings have been dedicated to the memory of Paul Erdos. From July 4 to 11, 1999, the conference -Paul Erdos and his Mathematics- was held in Budapest, with the ambitious goal of showing the whole range of Erdos' work - a difficult task in view of Erdos' versatility and his broad scope of interest in mathematics. According to this goal, the topics of lectures, given by the leading specialists of the subjects, included number theory, combinatorics, analysis, set theory, probability, geometry and areas connecting them, like ergodic theory. The...