Yusupov Gulzorkhon Amirshoevich

Publications in Math-Net.Ru

1. On the best polynomial approximation of functions in the Hardy space $H_{q,R}, (1\le q\le\infty, R\ge 1)$
   
   Chebyshevskii Sb., 24:1 (2023),  182–193
2. On the best simultaneous polynomial approximation of functions and their derivatives in Hardy spaces
   
   Trudy Inst. Mat. i Mekh. UrO RAN, 27:4 (2021),  239–254
3. Best approximation methods and widths for some classes of functions in $H_{q,\rho}$, $1\le q\le\infty$, $0<\rho\le1$
   
   Sibirsk. Mat. Zh., 57:2 (2016),  469–478
4. Best polynomial approximations and widths of certain classes of functions in the space $L_2$
   
   Eurasian Math. J., 4:3 (2013),  120–126
5. Exact Values of Widths of Some Functional Classes in $L_{2}$ and Minimization of the Constants in Inequalities of Jackson–Stechkin Type
   
   Model. Anal. Inform. Sist., 20:5 (2013),  106–116
6. On the exact values of mean $\nu$-widths of some classes of entire functions
   
   Trudy Inst. Mat. i Mekh. UrO RAN, 18:4 (2012),  315–327
7. Best Polynomial Approximations in $L_2$ of Classes of $2\pi$-Periodic Functions and Exact Values of Their Widths
   
   Mat. Zametki, 90:5 (2011),  764–775
8. Exact constants in Jackson-type inequalities and exact values of the widths of some classes of functions in $L_2$
   
   Sibirsk. Mat. Zh., 52:6 (2011),  1414–1427