Exact constants in direct and inverse approximation theorems for functions of several variables in the spaces Sp

Autor:	V. V. Savchuk, L Andrii Shidlich, G Fahreddin Abdullayev, Pelin Özkartepe
Rok vydání:	2019
Předmět:	Pure mathematics General Mathematics Inverse Mathematics
Zdroj:	Filomat. 33:1471-1484
ISSN:	2406-0933 0354-5180
DOI:	10.2298/fil1905471a
Popis:	In the paper, exact constants in direct and inverse approximation theorems for functions of several variables are found in the spaces Sp. The equivalence between moduli of smoothness and some K-functionals is also shown in the spaces Sp.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1b7565a3ba742584917f650cf605b912 https://doi.org/10.2298/fil1905471a Zobrazit plný text záznamu