N.S. Rytova

The potential of a point charge is calculated, with and without taking screening into account, for a thin semiconductor film the thickness of which is less than the De Broglie wavelength of free carriers.

V.N. Mel'nikov

Equations are obtained for the (Green's functions. The kernel of Lenard's equation is evaluated in quadratures and its connection with the Landau kernel (used later)is pointed out. Successive approximations are used to find the form of the Green's function in E- and K-space, and the eigenfrequencies and damping of a system subject to spatial dispersion.

O.S. Pavlova and A.M. Khapaev

The radiation of a relativistic rotator with spin orientation is investigated by quantum-theoretical methods and compared with synchronous radiation.

K.F. Teodorchik and L.T. Filimonov

Root criteria for the limiting stability of linear systems, some of the poles of the transmission functions of which lie on the imaginary axis, are discussed.

V.Ch. Zhukovskii and Yu.A. Korovin

The effect of radiation on the motion of relativistic electrons in constant and uniform magnetic and weak electrostatic fields is considered. Both the quantum and classical change in the trajectory is considered by a single method.

M.N. Makhanta

The field energy-momentum tensor provides the basis foi an examination of the geometric structure of an electromagnetic field.

Nguen Tang

Exact relationships are derived by the Gibbs' method for calculating the fluctuations and correlations of quantum systems. A fluctuation-dissi­pation theorem is obtained without using perturbation theory. The re­ sults are used to calculate the mean square displacement of Brownian motion.

P.S. Bulkin, V.N. Ponomarev, and G.S. Solntsev

S.N. Eremeev

Yu.M. Nikolaev