Abstract
We study some properties of the logconvex quasi-Banach space QA defined by Arias-de-Reyna and show several applications to convergence of Fourier series. In particular, we describe the Banach envelope of QA and prove that there exists a Lorentz space strictly bigger than the Antonov space in which the almost everywhere convergence of the Fourier series holds. We also give a necessary condition for a Banach rearrangement invariant space X to be contained in QA. As an application, we show that for some classes of Banach spaces there is no the largest Banach space in a given class which is contained in QA.
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Communicated by Tom Koerner.
To the memory of Nigel Kalton.
The first author was supported by MTM2010-14946, the second author by Committee of Scientific-Research, Poland, grant No. 201 385034 and the third author by MTM2009-08934.
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Carro, M.J., Mastyło, M. & Rodríguez-Piazza, L. Almost Everywhere Convergent Fourier Series. J Fourier Anal Appl 18, 266–286 (2012). https://doi.org/10.1007/s00041-011-9199-9
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DOI: https://doi.org/10.1007/s00041-011-9199-9
Keywords
- Fourier series
- Almost everywhere convergence
- Lorentz spaces
- Banach envelope
- Rearrangement invariant spaces