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On Divergence of Fejér Means with Respect to Walsh System on Sets of Measure Zero
Tbilisi State University, Georgia.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). UiT The Arctic University of Norway, Norway.ORCID iD: 0000-0002-5914-3247
The University of Georgia, Georgia.
2024 (English)In: Tbilisi Analysis and PDE Seminar: (TAPDES 2023) / [ed] Roland Duduchava, Eugene Shargorodsky, George Tephnadze, Birkhäuser Verlag, Birkhäuser Verlag, 2024, Vol. 7, p. 21-29Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we prove by the concrete construction that for any set E of measure zero there exists a function f∈Lp(G)(1≤p<∞) such that the Féjer means with respect to Wals system diverge on this set. The key is to use new constructions of Walsh polynomials, which was introduced in Persson et al. (Martingale Hardy Spaces and Summability of One-dimensional Vilenkin-Fourier Series. Birkhäuser/Springer, 2022). In fact, the theorem we prove follows from the general result of Karagulyan (Mat. Sb. 202(1):11–36, 2011), but we provide an alternative approach and the constructed function in our proof has a simpler explicit representation. 

Place, publisher, year, edition, pages
Birkhäuser Verlag, 2024. Vol. 7, p. 21-29
Series
Trends in Mathematics, ISSN 2297-0215, E-ISSN 2297-024X ; RPGAPC,volume 7
National Category
Mathematical Analysis
Research subject
Mathematics
Identifiers
URN: urn:nbn:se:kau:diva-101864DOI: 10.1007/978-3-031-62894-8_3Scopus ID: 2-s2.0-85202544142ISBN: 978-3-031-62893-1 (print)ISBN: 978-3-031-62894-8 (electronic)OAI: oai:DiVA.org:kau-101864DiVA, id: diva2:1903606
Conference
Tbilisi Analysis and PDE Seminar, Tblisi, Georgia, August 30 - September 02, 2023.
Available from: 2024-10-04 Created: 2024-10-04 Last updated: 2025-10-16Bibliographically approved

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Persson, Lars-Erik

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