Stepanets Alexander Ivanovich

Publications in Math-Net.Ru

1. Extremal problems for integrals of non-negative functions
   
   Izv. RAN. Ser. Mat., 74:3 (2010),  169–224
2. Extremal Problems for Numerical Series
   
   Mat. Zametki, 82:5 (2007),  736–755
3. Solution of the Kolmogorov–Nikol'skii problem for the Poisson integrals of continuous functions
   
   Mat. Sb., 192:1 (2001),  113–138
4. Approximation by Fourier operators of functions that are defined on the real axis
   
   Dokl. Akad. Nauk SSSR, 303:1 (1988),  50–53
5. Strong summability of Fourier series on classes of $(\psi,\beta)$-differentiable functions
   
   Mat. Zametki, 44:4 (1988),  506–516
6. Approximations on classes of $(\psi,\beta)$-differentiable functions
   
   Dokl. Akad. Nauk SSSR, 293:4 (1987),  797–800
7. Best approximations of infinitely differentiable functions in the space $L_s$
   
   Mat. Zametki, 42:1 (1987),  21–32
8. Approximation of periodic functions by Fourier sums
   
   Trudy Mat. Inst. Steklov., 180 (1987),  202–204
9. Classification of periodic functions and the rate of convergence of their Fourier series
   
   Izv. Akad. Nauk SSSR Ser. Mat., 50:1 (1986),  101–136
10. Classes of periodic functions and the approximation of their elements by Fourier sums
    
    Dokl. Akad. Nauk SSSR, 277:5 (1984),  1074–1077
11. Simultaneous approximation of periodic functions and their derivatives
    
    Mat. Zametki, 36:6 (1984),  873–882
12. Simultaneous approximation of a pair of conjugate functions
    
    Mat. Zametki, 34:5 (1983),  641–650
13. Suprema of Fourier coefficients on classes of continuous and differentiable functions of several variables
    
    Izv. Akad. Nauk SSSR Ser. Mat., 46:3 (1982),  650–665
14. Sharp estimates of Fourier coefficients on classes of continuous and differentiable periodic functions of several variables
    
    Dokl. Akad. Nauk SSSR, 261:1 (1981),  34–38
15. Simultaneous approximation of periodic functions and their derivatives by Fourier sums
    
    Dokl. Akad. Nauk SSSR, 254:3 (1980),  543–544
16. Estimates of the deviations of partial Fourier sums on classes of continuous periodic functions of several variables
    
    Izv. Akad. Nauk SSSR Ser. Mat., 44:5 (1980),  1150–1190
17. Approximation of Fourier sums on classes of periodic functions that are defined by polyharmonic operators
    
    Mat. Zametki, 27:4 (1980),  569–581
18. Approximation by Riesz sums of periodic functions of Hölder classes
    
    Mat. Zametki, 21:3 (1977),  341–354
19. Approximation of continuous periodic functions of many variables by spherical Riesz means
    
    Mat. Zametki, 15:5 (1974),  821–832
20. The approximation of continuous periodic functions of two variables by Faward sums
    
    Mat. Zametki, 13:5 (1973),  655–666
21. Deviation of partial sums of Fourier series in Hölder classes of functions of two variables
    
    Dokl. Akad. Nauk SSSR, 206:3 (1972),  549–551