Open AccessOn approximation, in the strong sense, of functions of two variables by trigonometric polynomials
Author(s) -
V.V. Lipovik,
N. P. Khoroshko
Publication year - 2021
Publication title -
researches in mathematics
Language(s) - English
Resource type - Journals
eISSN - 2664-5009
pISSN - 2664-4991
DOI - 10.15421/247706
Subject(s) - trigonometry , mathematics , sense (electronics) , differentiation of trigonometric functions , proofs of trigonometric identities , trigonometric polynomial , trigonometric substitution , trigonometric functions , order (exchange) , matrix (chemical analysis) , trigonometric integral , pure mathematics , mathematical analysis , polynomial , materials science , geometry , electrical engineering , finance , composite material , linear interpolation , economics , engineering , bicubic interpolation
In the paper, we have found order asymptotic estimates of approximations, in the strong sense, relative to given matrix of classes of continuous periodic functions of two variables by some trigonometric polynomials.