Reviews of topical problems

Yu.A. Izyumov “Magnetism and superconductivity in strongly correlated systems” Sov. Phys. Usp. 34 (11) 935–957 (1991)

M.F. Sarry “Analytical methods of calculating correlation functions in quantum statistical physics” Sov. Phys. Usp. 34 (11) 958–979 (1991)

A.I. Frank “Modern optics of long-wavelength neutrons” Sov. Phys. Usp. 34 (11) 980–987 (1991)

I.M. Frank “Neutron optics and ultracold neutrons” Sov. Phys. Usp. 34 (11) 988–996 (1991)

Methodological notes

V.L. Lyuboshits, M.I. Podgoretskii “The Archimedes force acting on individual molecules of matter in an external field” Sov. Phys. Usp. 34 (11) 997–1007 (1991)

S.G. Rautian “The diffusion approximation in the problem of migration of particles in a gas” Sov. Phys. Usp. 34 (11) 1008–1017 (1991)

B.A. Trubnikov “Constrictions in a relativistic pinch with a longitudinal magnetic field” Sov. Phys. Usp. 34 (11) 1018–1020 (1991)

Book reviews

B.M. Smirnov “From Newton to Mandelbrot: concepts in theoretical physics” Sov. Phys. Usp. 34 (11) 1021–1021 (1991)

S.A. Akhmanov “Milestones on the thorny path of science” Sov. Phys. Usp. 34 (11) 1022–1023 (1991)

V.I. Petviashvili “Physics of thermonuclear plasma” Sov. Phys. Usp. 34 (11) 1024–1024 (1991)

M.I. Rabinovich, M.M. Sushchik “Numerical experiment in hydrodynamics” Sov. Phys. Usp. 34 (11) 1025–1025 (1991)

Errata

G.R. Ivanitskii, A.B. Medvinskii, M.A. Tsyganov “Errata: From disorder to order as applied to the movement of micro-organisms [Sov. Phys. Usp. 34, 289-316 (April 1991)]” Sov. Phys. Usp. 34 (11) 1026–1026 (1991)