Research output: Contribution to journal › Article › peer-review
Sharp inequalities for approximations of convolution classes on the real line as the limit case of inequalities for periodic convolutions. / Vinogradov, O. L.
In: Siberian Mathematical Journal, Vol. 58, No. 2, 01.03.2017, p. 190-204.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Sharp inequalities for approximations of convolution classes on the real line as the limit case of inequalities for periodic convolutions
AU - Vinogradov, O. L.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - We establish sharp estimates for the best approximations of convolution classes by entire functions of exponential type. To obtain these estimates, we propose a new method for testing Nikol’skiĭ-type conditions which is based on kernel periodization with an arbitrarily large period and ensuing passage to the limit. As particular cases, we obtain sharp estimates for approximation of convolution classes with variation diminishing kernels and generalized Bernoulli and Poisson kernels.
AB - We establish sharp estimates for the best approximations of convolution classes by entire functions of exponential type. To obtain these estimates, we propose a new method for testing Nikol’skiĭ-type conditions which is based on kernel periodization with an arbitrarily large period and ensuing passage to the limit. As particular cases, we obtain sharp estimates for approximation of convolution classes with variation diminishing kernels and generalized Bernoulli and Poisson kernels.
KW - convolution
KW - entire function of exponential type
KW - inequalities of Akhiezer–Kreĭn–Favard type
UR - http://www.scopus.com/inward/record.url?scp=85018830343&partnerID=8YFLogxK
U2 - 10.1134/S0037446617020021
DO - 10.1134/S0037446617020021
M3 - Article
AN - SCOPUS:85018830343
VL - 58
SP - 190
EP - 204
JO - Siberian Mathematical Journal
JF - Siberian Mathematical Journal
SN - 0037-4466
IS - 2
ER -
ID: 15680199