"Published under Grant NSF-GN232 from the National Science Foundation"--Title page verso.

Includes bibliographical references.

Simultaneous approximation of functions and their derivatives on the whole real axis /; Best approximation of functions of two variables by functions of the form phi (x)+\psi (y) /; Two classes of extremal problems for polynomials and moments /; On approximation, with reference to the size of the coefficients of the approximants /; On approximation of functions in the spaces widetilde W^{(l)}_p(D) and ^{(l)}_p(D) by continuously differentiable functions /; On limit values of multiplicative integrals /; An inequality in the theory of Fourier integrals /; Integrals of Cauchy type /; An abstract integral investigated by S. Banach /; Integral transforms with Volterra kernels /; Theory of general kernel transformations /; The representation of measurable functions by integrals with kernels of unitary transformations of the space _2(0, \infty ,) / A. F. Timan; Ju. P. Ofman; S. Ja. Havinson; S. Ja. Havinson; V. P. Ilin; L. A. Sahnovic; K. I. Babenko; P. L. Uljanov; G. P. Tolstov; M. M. Dzrbasjan; M. M. Dzrbasjan and R. M. Martirosjan; A. A. Talaljan