Mat. Zametki, 1991, Volume 50, Issue 5

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1991, Volume 50, Issue 5

	Self-adjoint and non-self-adjoint extensions of the symmetric operator generated by an infinite Jacobi matrix B. P. Allakhverdiev	3
	Removable singularities of solutions of second-order parabolic equations Yu. A. Alkhutov	9
	Separability and distance A. G. Bakan	18
	Rate of approximation of functions in the Hardy–Orlicz classes $H_{\varphi}$ G. M. Vartanyan	23
	Asymptotics of an integral that arises in the theory of perturbations of KdV solitons L. A. Kalyakin	32
	Condition for a regular set function in a topological space to be exhaustive V. M. Klimkin, T. A. Sribnaya	43
	Isoperimetric estimates of the second boundary value problem for the Poisson equation A. A. Kosmodem'yanskii (Jr.)	48
	Boundedness and compactness criteria for a certain difference inclusion R. Oinarov, A. P. Stikharnyi	54
	Cavalieri conditions for a $k$-dimensional radon transformation E. E. Petrov	61
	Nonnegative trigonometric polynomials in many variables and cubature formulas of Gaussian type A. V. Reztsov	69
	Convex sections of graphs of continuous functions P. V. Semenov	75
	Polynomial convexity of some sets in $C^n$ M. M. Smirnov, E. M. Chirka	81
	Continuation of homogeneous functionals with a given convexity V. A. Smirnov, V. A. Sheikhman	90
	Equations of hydrodynamic type from the point of view of the theory of webs E. V. Ferapontov	97
	The Ock–Grawert principle for the extension of holomorphic line bundles with integrable curvature V. V. Shevchishin	109
	An integral estimate of distances between cross sections of two sets by planes O. B. Sheremet	120
	Hausdorff dimension of a class of non-self-similar fractals M. A. Shereshevskii	129
	Inverse problem for integrodifferential operators V. A. Yurko	134

Brief Communications
	Estimates for the Kolmogorov diameters of classes of functions with conditions on the mixed difference in the uniform metric È. S. Belinskii	147
	Estimate for the remainder in the Tate formula V. A. Dem'yanenko	149
	Fluctuation of averages in the strong law of large numbers A. G. Kachurovskii	151
	Application of quasi-classical methods in a study of the Belavkin quantum filtration V. N. Kolokoltsov	153
	Perturbation method for a weakly nonlinear hyperbolic first order problem V. P. Shutyaev	156

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