ELECTROWEAK BARYON NUMBER NONCONSERVATION IN THE EARLY UNIVERSE AND IN HIGH-ENERGY COLLISIONS

We review recent progress in the study of the anomalous baryon number non-conservation at high temperatures and in high-energy collisions. R ecent results on high temperature phase transitions are described, and applications to the electroweak baryogenesis are considered. The curr ent status of the problem of electroweak instanton-like processes at h igh energies is outlined.