Exact constants in direct and inverse approximation theorems for functions of several variables in the spaces Sp FG Abdullayev, P Özkartepe, VV Savchuk, AL Shidlich
Filomat 33 (5), 1471-1484, 2019
17 2019 Approximation of functions of several variables by linear methods in the space S p VV Savchuk, AL Shidlich
Acta Scientiarum Mathematicarum 80, 477-489, 2014
15 2014 Approximation of analytic functions by de la Vallee Poussin sums VV Savchuk, MV Savchuk, SO Chaichenko
Mat. Stud 34 (2), 207-219, 2010
14 2010 Best linear methods of approximation and optimal orthonormal systems of the Hardy space. VV Savchuk
Ukrainian Mathematical Journal 60 (5), 2008
10 2008 Approximation of holomorphic functions by Taylor-Abel-Poisson means VV Savchuk
Ukrainian Mathematical Journal 59, 1397-1407, 2007
9 2007 Best approximation by holomorphic functions. Application to the best polynomial approximation of classes of holomorphic functions VV Savchuk
Ukrainian Mathematical Journal 59 (8), 1163-1183, 2007
9 2007 Наближення голоморфних функцій середніми Тейлора-Абеля-Пуассона ВВ Савчук
Український математичний журнал, 2007
8 2007 Approximation theorems for multivariate Taylor-Abel-Poisson means J Prestin, V Savchuk, A Shidlich
arXiv preprint arXiv:1901.06275, 2019
7 2019 Best approximations for the Cauchy kernel on the real axis VM Savchuk, SO Chaichenko
Ukrainian Mathematical Journal 66, 1731-1741, 2015
7 2015 Approximation of Cauchy-type integrals OI Stepanets', VV Savchuk
Ukrainian Mathematical Journal 54 (5), 869-911, 2002
7 2002 Direct and Inverse Theorems on the Approximation of 2π-Periodic Functions by Taylor-Abel-Poisson Operators. J Prestin, V Savchuk, A Shidlich
Ukrainian Mathematical Journal 69 (5), 2017
6 2017 Approximation of classes of convolutions by linear operators of special form VP Zastavnyi, VV Savchuk
Mathematical Notes 90, 333-343, 2011
6 2011 Approximation of functions by linear summation methods in the Orlicz-type spaces S Chaichenko, V Savchuk, A Shidlich
Journal of Mathematical Sciences 249, 705-719, 2020
5 2020 Direct and inverse approximation theorems of J Prestin, V Savchuk, A Shidlich
arXiv preprint arXiv:1609.09615, 2016
5 2016 Approximation of some classes of holomorphic functions and properties of generating kernels V Savchuk
Azerbaijan Journal of Mathematics 1 (2), 115-131, 2011
5 2011 Best linear methods for approximation of bounded harmonic functions VV Savchuk
Nonlinear Oscillations 11 (2), 255-264, 2008
5 2008 Approximation of functions of Dirichlet class by Fejér means VV Savchuk
Mathematical Notes 81, 665-670, 2007
5 2007 Best linear methods of approximation of functions of the Hardy class H p VV Savchuk
Ukrainian Mathematical Journal 55 (7), 1110-1118, 2003
5 2003 Norms of Multipliers and Best Approximations of Holomorphic Functions of Many Variables VV Savchuk, MV Savchuk
Ukrainian Mathematical Journal 54 (12), 2025-2037, 2002
5 2002 Approximation of bounded holomorphic and harmonic functions by Fejér means VV Savchuk, SO Chaichenko, MV Savchuk
Ukrainian Mathematical Journal 71, 589-618, 2019
4 2019 
Andrii L. ShydlichInstitute of Mathematics of NAS of UkraineVahvistettu sähköpostiosoite verkkotunnuksessa imath.kiev.ua
