Research output: Contribution to journal › Article › peer-review
To recovering of continuous function by sequences of its Fejér sums values at the given set of points. / Kachurovskii, Alexander; Podvigin, Ivan.
In: Proceedings of the International Geometry Center, Vol. 13, No. 3, 13.10.2020, p. 1-9.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - To recovering of continuous function by sequences of its Fejér sums values at the given set of points
AU - Kachurovskii, Alexander
AU - Podvigin, Ivan
N1 - Funding Information: The work was carried out in the framework of the State Contract of the Sobolev Institute of Mathematics (Project 0314-2019-0005) Publisher Copyright: © 2020 Proceedings of the International Geometry Center. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/13
Y1 - 2020/10/13
N2 - It is shown that a continuous 2p-periodic function is uniquely recovered (on the whole real line) by sequences of its Fejér sums values at the given finite set of points if and only if there exist two of these points with the distance between them incommensurable with p. And that full sets of Fejér integrals at any two different points always uniquely recover continuous absolutely Lebesgue integrable on the real line function. Wherein known sequence of Fejér sums values at a fixed single point x ∈ R and full set of Fejér integrals at this point determines uniquely a function only in the class of continuous functions with an even shift by x.
AB - It is shown that a continuous 2p-periodic function is uniquely recovered (on the whole real line) by sequences of its Fejér sums values at the given finite set of points if and only if there exist two of these points with the distance between them incommensurable with p. And that full sets of Fejér integrals at any two different points always uniquely recover continuous absolutely Lebesgue integrable on the real line function. Wherein known sequence of Fejér sums values at a fixed single point x ∈ R and full set of Fejér integrals at this point determines uniquely a function only in the class of continuous functions with an even shift by x.
KW - Continuous 2p-periodic functions
KW - Continuous absolutely Lebesgue integrable on the real line functions
KW - Fejér integrals
KW - Fejér sums
KW - Uniquely recovering
UR - http://www.scopus.com/inward/record.url?scp=85095877095&partnerID=8YFLogxK
U2 - 10.15673/TMGC.V13I3.1757
DO - 10.15673/TMGC.V13I3.1757
M3 - Article
AN - SCOPUS:85095877095
VL - 13
SP - 1
EP - 9
JO - Proceedings of the International Geometry Center
JF - Proceedings of the International Geometry Center
SN - 2072-9812
IS - 3
ER -
ID: 25993730