Skip to main content
Log in

Some inequalities of Hardy-Littlewood type

Некоторые неравенст ва типа неравенств Харди-Литтлвуда

  • Published:
Analysis Mathematica Aims and scope Submit manuscript

Abstract

КОНЮШКОВ [3] установи л, ч то если при некоторомτ>0 последовательностьn −τ a n убывает, то одно из четырех широко извес тных неравенств Харди и Литтлвуда можно обр атить. Мы доказываем, ч то при некоторых близких ус ловиях остальные три нераве нства Харди и Литтлву да также можно обратить. Это утверждение мы по лучаем как частный сл учай более общих результатов. Показано также, что пр и некоторых условиях типа слабой регулярности найден ные достаточные условия являются и необходим ыми.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

References

  1. N. K. Bari andS. B. Stečkin, Best approximation and differential properties of two conjugate functions (Russian),Trudy Moskov. Mat. Obshch.,5 (1956), 485–522.

    Google Scholar 

  2. G. H. Hardy andJ. E. Littlewood, Elementary theorems concerning power series with positive coefficients and moment constants of positive functions,J. reine angew. Math.,157(1927), 141–158.

    Google Scholar 

  3. A. A. Konyushkov, Best approximation by trigonometric polynomials and Fourier coefficients (Russian),Math. Sb.,44(1958), 53–84.

    Google Scholar 

  4. L. Leindler, Generalization of inequalities Hardy and Littlewood,Acta Sci. Math. (Szeged),31(1970), 279–285.

    Google Scholar 

  5. L. Leindler, Inequalities of Hardy-Littlewood type,Analysis Math.,2(1976), 117–123.

    Google Scholar 

  6. L. Leindler, Further sharpening of inequalities of Hardy and Littlewood,Acta Sci. Math. (Szeged),54(1990), 285–289.

    Google Scholar 

  7. E. T. Copson, Note on series of positive terms,J. London Math. Soc.,2(1927), 9–12, and3(1928), 49–51.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

This research was partially supported by the Hungarian National Foundation for Scientific Research under Grant #234.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Leindler, L. Some inequalities of Hardy-Littlewood type. Analysis Mathematica 20, 95–106 (1994). https://doi.org/10.1007/BF01908641

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01908641

Navigation