Approximation to continuous functions by Walsh-Fourier sums N. V. Guličev OriginalPaper Pages: 269 - 280
New estimates of errors of quadrature formulae, formulae of numerical differentiation and interpolation Kamen G. Ivanov OriginalPaper Pages: 281 - 303
On the growth order of the rectangular partial sums of multiple non-orthogonal series F. Móricz OriginalPaper Pages: 327 - 341