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JOURNALS // Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika // Archive

Izv. Vyssh. Uchebn. Zaved. Mat., 2019 Number 5, Pages 63–69 (Mi ivm9464)

This article is cited in 1 paper

On Faber–Schauder coefficients of continuous functions and divergence of greedy algorighms

A. A. Sargsyan

Russian-Armenian University, 123 Hovsep Emin str., Yerevan, 0051 Armenia

Abstract: We consider relationship between the rate of convergence to zero of the Faber–Schauder coefficients of continuous functions and the behavior of the greedy algorithm. We construct a continuous function $f$ with Faber–Schauder coefficients $|A_n (f)|=O(\log^{-1} n)$ and divergent greedy algorithm.

Keywords: greedy algorithm, Faber–Schauder system, coefficients of expansion, uniform convergence.

UDC: 517.51

Received: 22.03.2018
Revised: 18.07.2018
Accepted: 26.09.2018

DOI: 10.26907/0021-3446-2019-5-63-69


 English version:
Russian Mathematics (Izvestiya VUZ. Matematika), 2019, 63:5, 57–62

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© Steklov Math. Inst. of RAS, 2024