Theoretical and Mathematical Physics a translation of Teoreticheskaya i Matematicheskaya Fizikapiis a publication of the Russian Academy of Sciences. Articles report on current developments in theoretical physics as well as mathematical problems related to this field. The journal covers quantum field theory and theory of elementary particles fundamental problems of nuclear physics the many-body problem and statistical physics nonrelativistic quantum mechanics and basic problems of gravitation theory. The Russian volume-year is published in English beginning in July.