Sharp Jackson-Stechkin type inequalities for periodic functions in L and widths of function classes.Published in:Doklady Mathematics, 2013, v. 88, n. 1, p. 478, doi. 10.1134/S106456241304039XBy:Shabozov, M.;Vakarchuk, S.;Zabutnaya, V.Publication type:Article
Direct Jackson-type estimate for the general modulus of smoothness in the nonperiodic case.Published in:Mathematical Notes, 2015, v. 97, n. 5/6, p. 811, doi. 10.1134/S0001434615050168By:Artamonov, S.Publication type:Article