Brief Communications

Realizations of Mixed Generalized $K$-Functionals

N. V. Omel'chenko^a, K. V. Runovskii<sup>b

a</sup> Sevastopol State University
^b Sevastopol Branch of the M.V. Lomonosov Moscow State University

Keywords: $K$-functional, mixed generalized derivative, Fourier means, families of linear polynomial operators.

Received: 30.06.2019

DOI: 10.4213/mzm12669

 English version: Mathematical Notes, 2020, 107:2, 353–356

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