scientific article

From MaRDI portal
Publication:3993375

zbMath0689.42002MaRDI QIDQ3993375

A. I. Stepanets

Publication date: 17 September 1992


Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.



Related Items (64)

Order estimates of the \(L_q\)-norms of generalized derivatives of the Dirichlet-type kernels with an arbitrary choice of harmonicsApproximation of Poisson integrals by repeated de la Vallée Poussin sumsApproximation of \((\overline\psi,\overline\beta)\)-differentiable periodic functions of many variablesApproximation of Cauchy-type integrals in Jordan domainsEstimations of the best approximations for the classes of infinitely differentiable functions in uniform and integral metricsOrder estimates for the best approximations and approximations by Fourier sums in the classes of convolutions of periodic functions of low smoothness in the uniform metricClasses of functions defined on the real line and their approximation by entire functions. IUniform estimates of (\(\lambda\) ,\(\phi\) )-strong integral average deviations of Fourier operatorsEstimates of the diameters of convolution classes in the spaces C and LApproximation of classes of Poisson integrals by repeated Fejer sumsApproximation of locally integrable functions on the real lineOn the approximation of the classes \(W_\beta^r H^\alpha\) by biharmonic Poisson integralsApproximation by interpolation trigonometric polynomials on classes of periodic analytic functionsExact values of the approximations of differentiable functions by Poisson-type integralsApproximating characteristics of the classes \(L_{\beta,p}^\psi\) of periodic functions in the space \(L_q\)Order estimates for the best approximations and approximations by Fourier sums of the classes of \((\psi, \beta)\)-differential functionsUniform approximations by Fourier sums on the sets of convolutions of periodic functions of high smoothnessApproximation of classes \({C}_{\beta, \infty}^{\psi }\) by three-harmonic Poisson integrals in uniform metric (low smoothness)Some asymptotic properties of the solutions of Laplace equations in a unit diskApproximation of the classes \(C_{\beta}^{\psi } H^\alpha\) by biharmonic Poisson integralsStrong summability of Fourier series of (\(\psi\) ,\(\beta\))-differentiable functionsDirect theorems on approximation of periodic functions with high generalized smoothnessAsymptotic behavior of best approximations of classes of Poisson integrals of functions from \(H_\omega\)Lebesgue-type inequalities for the de la Valée-Poussin sums on sets of analytic functionsStrong summability of Fourier series on classes of periodic functionsApproximation of classes of analytic functions by algebraic polynomials and Kolmogorov widthsProblems of saturation of linear methodsBest trigonometric and bilinear approximations for the classes of \((\psi,\beta)\)-differentiable periodic functionsBernstein-Nikol'skii-type inequalities for trigonometric polynomials with an arbitrary choice of harmonicsApproximation of the classes of generalized Poisson integrals by Fourier sums in metrics of the spaces \(L_S\)Multiple Fourier sums on sets of \((\psi{},\beta{})\)-differentiable functionsApproximation by entire functions in the mean on the real lineApproximation of functions from the classes \(C_{\beta, \infty}^{\psi}\) by biharmonic Poisson integralsOrder Estimates of Best Orthogonal Trigonometric Approximations of Classes of Infinitely Differentiable FunctionsAsymptotics of approximation of continuous periodic functions by linear means of their Fourier seriesApproximation of the Besov classes of periodic functions of several variables in the space \(L_ q\)Some remarks on the approximation of functions of high smoothness by Fourier operatorsApproximation of functions defined on the real axis by means of de la Vallée-Poussin operatorsApproximation of \((\psi, \beta)\)-differentiable functions of low smoothness by biharmonic Poisson integralsApproximation of classes of periodic functions of several variablesEstimation of the best bilinear approximations for the classes of \((\psi, \beta)\)-differentiable periodic multivariable functionsApproximation theory and optimization problemsOn the optimality of the trigonometric systemGeneralized smoothness and approximation of periodic functions in the spaces \(L_p\), \(1 < p < +\infty \)Estimates for a group of \(\varphi \) deviations and the strong summability of Taylor series of functions of class \(A ^\psi H_{\infty}(D)\)Approximation of the classes $W^{r}_{\beta,\infty}$ by three-harmonic Poisson integralsMean-square rate of convergence of orthogonal seriesApproximation of functions of high smoothness by Fourier sumsUniform approximation by spherical Fourier sums on classes of functions defined by polyharmonic operatorsOptimization of adaptive direct methods for the solution of operator equations in Hilbert spaceBehavior of the group of derivations on sets of (\(\psi\) ,\(\beta\) )- differentiable functionsClasses of functions defined on the real axis and their approximations by entire functions. IIApproximation of weakly differentiable periodic functionsAsymptotic estimates of approximation of continuous periodic functions by Fourier sumsUniform estimates of the integral strong mean deviations of continuous functions by entire functionsStrong mean deviations of Fourier operatorsThe lower estimate of deviations of Fejer sums on classes of Poisson integralsMultiplicator type operators and approximation of periodic functions of one variable by trigonometric polynomialsOptimal approximation on \(S^d\)Recovery of continuous functions from their Fourier coefficients known with errorApproximation properties of Poisson integrals for the classes \(C_\beta^\psi H^\alpha\)Saturation classes of linear methods of summation of Fourier seriesOn Fourier coefficients of functions of class \(C^{\phi}_{\beta}H^{\omega}_ X\)Inverse theorems on the approximation of periodic functions with high generalized smoothness




This page was built for publication: