Magnetotransport of electrons in quantum Hall systems

Recent thoretical results on magnetotransport of electrons in a 2D system in the range of moderately strong transverse magnetic fields are reviewed. The phenomena discussed include: quasiclassical memory effects in systems with various types of disorder transport in lateral superlattices. interaction indusced quantum magnetoresistance, quantum magneto-oscillations in dc and ac transport, and ac transport, and oscillatory microwave photoconductivity.