Smoothness criteria for a Banach space to be convertible into a Hilbert space B. E. Veits OriginalPaper Pages: 221 - 224
A discreteness criterion for the spectrum of a quasielliptic operator M. G. Gimadislamov OriginalPaper Pages: 225 - 229
Discreteness of the spectrum and completeness of systems of characteristic and associated vectors of second-order nonself-adjoint differential operators I. I. Golichev OriginalPaper Pages: 230 - 234
The existence of Levitan almost-periodic solutions of linear systems (second complement to Favard's classical theory) V. V. Zhikov OriginalPaper Pages: 235 - 238
Stabilization of solutions of linear differential equations in Hilbert space A. B. Bakushinskii OriginalPaper Pages: 239 - 242
A sufficient condition for the oscillation of solutions of a high-order differential equation I. V. Kamenev OriginalPaper Pages: 243 - 244
A combination of the finite-sum and Monte Carlo methods for the solution of integral equations of the second kind G. A. Mikhailov OriginalPaper Pages: 245 - 249
Algebraic-polynomial approximation of functions satisfying a Lipschitz condition N. P. KorneichukA. I. Polovina OriginalPaper Pages: 254 - 257
Theorems concerning the uniqueness of Haar series for summation methods V. A. Skvortsov OriginalPaper Pages: 258 - 262
Divergence everywhere of rearranged Fourier series of continuous functions L. V. Taikov OriginalPaper Pages: 263 - 266
Some problems in approximation theory and in entire-function theory N. U. Arakelyan OriginalPaper Pages: 267 - 271