Electroweak baryon number nonconservation in the early Universe and in high-energy collisions

Progress in the study of the anomalous baryon number nonconservation at high temperatures and in high-energy collisions is discussed. Recent results on high temperature phase transitions are described. Applications to the electroweak baryosynthesis are considered. The current status of the problem of electroweak instanton-like processes at high energies is outlined. 337 refs., 16 figs