Startseite Almost everywhere convergence of some subsequences of Fejér means for integrable functions on some unbounded Vilenkin groups
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Almost everywhere convergence of some subsequences of Fejér means for integrable functions on some unbounded Vilenkin groups

  • Nacima Memić
Veröffentlicht/Copyright: 28. Februar 2017
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Abstract

Following the methods of G. Gát, in this work we prove the a.e convergence of the subsequence (σmn2Mnf)n , for every integrable function f on unbounded Vilenkin groups, such that the sequence (mn)n contains infinitely many even terms satisfying the estimate lnmk1lnmkmk=O(1).

MSC 2010: Primary 42C10

(Communicated by Ján Borsík)


Acknowledgement

I would like to thank the referees for their valuable remarks and comments.

References

[1] Gát, G.: Almost everywhere convergence of Fejér means of L1 functions on rarely unbounded Vilenkin groups, Acta Math. Sin. 23 (2007), 2269–2294.10.1007/s10114-007-0961-5Suche in Google Scholar

[2] Gát, G.: Cesàro means of integrable functions with respect to unbounded Vilenkin systems, J. Approx. Theory. 124 (2003), 25–43.10.1016/S0021-9045(03)00075-3Suche in Google Scholar

[3] Gát, G.: Pointwise convergence of the Fejér means of functions on unbounded Vilenkin groups, J. Approx. Theory. 101 (1999), 1–36.10.1006/jath.1999.3346Suche in Google Scholar

[4] Pál, J.—Simon, P.: On a generalization of the concept of derivative, Acta Math. Acad. Sci. Hungar. 29 (1977), 155–164.10.1007/BF01896477Suche in Google Scholar

[5] Young, W. S.: Mean convergence of generalized Walsh-Fourier series, Trans. Amer. Math. Soc. 218 (1976), 311–320.10.1090/S0002-9947-1976-0394022-8Suche in Google Scholar

Received: 2014-03-03
Accepted: 2015-01-23
Published Online: 2017-02-28
Published in Print: 2017-03-01

© Mathematical Institute Slovak Academy of Sciences

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