Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - The sharp Markov-Nikol’skii inequality for algebraic polynomials in the spaces L q and L 0 on a closed interval
AU - Glazyrina, P. Yu.
N1 - The author wishes to express gratitude to Professor V. V. Arestov for the statement of the problem and constant interest in the paper. This work was supported by the Russian Foundation for Basic Research (grant no. 05-01-00233) and the program “Leading Scientific Schools” (grant no. NSh-5120.2006.1).
PY - 2008/8/1
Y1 - 2008/8/1
N2 - In this paper, an inequality between the L q -mean of the kth derivative of an algebraic polynomial of degree n ≥ 1 and the L 0-mean of the polynomial on a closed interval is obtained. Earlier, the author obtained the best constant in this inequality for k = 0, q ∈ [0,∞] and 1 ≤ k ≤ n, q ∈ {0} ∪ [1,∞]. Here a newmethod for finding the best constant for all 0 ≤ k ≤ n, q ∈ [0,∞], and, in particular, for the case 1 ≤ k ≤ n, q ∈ (0, 1), which has not been studied before is proposed. We find the order of growth of the best constant with respect to n as n → ∞ for fixed k and q.
AB - In this paper, an inequality between the L q -mean of the kth derivative of an algebraic polynomial of degree n ≥ 1 and the L 0-mean of the polynomial on a closed interval is obtained. Earlier, the author obtained the best constant in this inequality for k = 0, q ∈ [0,∞] and 1 ≤ k ≤ n, q ∈ {0} ∪ [1,∞]. Here a newmethod for finding the best constant for all 0 ≤ k ≤ n, q ∈ [0,∞], and, in particular, for the case 1 ≤ k ≤ n, q ∈ (0, 1), which has not been studied before is proposed. We find the order of growth of the best constant with respect to n as n → ∞ for fixed k and q.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000258855600001
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=50849083799
U2 - 10.1134/S0001434608070018
DO - 10.1134/S0001434608070018
M3 - Article
VL - 84
SP - 3
EP - 21
JO - Mathematical Notes
JF - Mathematical Notes
SN - 0001-4346
IS - 1-2
ER -
ID: 38708537