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Estimates of Functions, Orthogonal to Piecewise Constant Functions, in Terms of the Second Modulus of Continuity. / Ikhsanov, L. N.
в: Journal of Mathematical Sciences (United States), Том 234, № 3, 01.10.2018, стр. 330-337.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Estimates of Functions, Orthogonal to Piecewise Constant Functions, in Terms of the Second Modulus of Continuity
AU - Ikhsanov, L. N.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The paper is devoted to the problem of finding the exact constant W2∗ in the inequality ‖f‖ ≤ K ⋅ ω2(f, 1) for bounded functions f with the property∫kk+1f(x)dx=0,k∈ℤ. Our approach allows us to reduce the known range for the desired constant as well as the set of functions involved in the extremal problem for finding the constant in question. It is shown that W2∗ also turns out to be the exact constant in a related Jackson–Stechkin type inequality.
AB - The paper is devoted to the problem of finding the exact constant W2∗ in the inequality ‖f‖ ≤ K ⋅ ω2(f, 1) for bounded functions f with the property∫kk+1f(x)dx=0,k∈ℤ. Our approach allows us to reduce the known range for the desired constant as well as the set of functions involved in the extremal problem for finding the constant in question. It is shown that W2∗ also turns out to be the exact constant in a related Jackson–Stechkin type inequality.
UR - http://www.scopus.com/inward/record.url?scp=85052729535&partnerID=8YFLogxK
U2 - 10.1007/s10958-018-4008-5
DO - 10.1007/s10958-018-4008-5
M3 - Article
AN - SCOPUS:85052729535
VL - 234
SP - 330
EP - 337
JO - Journal of Mathematical Sciences
JF - Journal of Mathematical Sciences
SN - 1072-3374
IS - 3
ER -
ID: 115437070