Skip to main content
Log in

Points of monotonicity in F-normed Orlicz function spaces

  • Published:
Aequationes mathematicae Aims and scope Submit manuscript

Abstract

In this paper points of lower strict monotonicity, upper strict monotonicity, lower local uniform monotonicity and upper local uniform monotonicity of Orlicz function spaces equipped with a Mazur–Orlicz F-norm and generated by a monotone (non-convex in general) Orlicz function are studied. We show that both the necessary and sufficient conditions and the suitable theorems are formulated in full generality. Moreover, lower (upper) strict monotonicity and lower (upper) local uniform monotonicity theorems of the paper https://doi.org/10.1007/s00010-018-0615-y are revealed as corollaries in this paper.

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.

Similar content being viewed by others

References

  1. Bai, X., Cui, Y., Kończak, J.: Monotonicities in Orlicz spaces equipped with Mazur–Orlicz \(F\)-norm. J. Funct. Spaces 2020(4), 1–7 (2020)

    MathSciNet  MATH  Google Scholar 

  2. Chen, S.: Geometry of Orlicz Spaces. Diss. Math. 356, 1–204 (1996)

    MathSciNet  Google Scholar 

  3. Chen, S., Cui, Y., Hudzik, H.: Isometric copies of \(l_{1}\) and \(l_{\infty }\) in Orlicz spaces equipped with the Orlicz norm. Proc. Am. Math. Soc. 132(2), 473–480 (2004)

    Article  MATH  Google Scholar 

  4. Chen, S., Xin, H., Hudzik, H.: Monotonicity and best approximation in Banach lattices. Acta Math. Sin. Engl. Ser. 25(5), 785–794 (2009)

    Article  MathSciNet  MATH  Google Scholar 

  5. Cui, Y., Hudzik, H., Kaczmarek, R., Kolwicz, P.: Geometric properties of F-normed Orlicz spaces. Aequat. Math. 93, 311–343 (2019)

    Article  MathSciNet  MATH  Google Scholar 

  6. Cui, Y., Hudzik, H., Kaczmarek, R., Kolwicz, P.: Uniform monotonicity of Orlicz spaces equipped with the Mazur–Orlicz F-norm and dominated best approximation in \(F\)-normed Köthe spaces. Math. Nachr. 295, 487–511 (2022)

    Article  MathSciNet  Google Scholar 

  7. Cui, Y., Hudzik, H., Szymaszkiewicz, L., Wang, T.: Criteria for monotonicity properties of Musielak–Orlicz spaces equipped with the Amemiya norm. J. Math. Anal. Appl. 303(2), 376–390 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  8. Hudzik, H., Kaczmarek, R., Wang, Y., Wójtowicz, M.: Problems of existence of order copies of \(l^\infty \) and \(L^p(\nu )\) in some non-Banach Köthe spaces. Positivity 23(4), 941–959 (2019)

    Article  MathSciNet  MATH  Google Scholar 

  9. Hudzik, H., Kaczmarek, R., Wójtowicz, M.: Some monotonicity properties in certain s-normed \((0<s<1)\) and \(F\)-normed lattices. J. Nonlinear Convex Anal. 17(10), 1985–2011 (2016) and corrigendum: J. Nonlinear Convex Anal. 18, No. 12, p. 2275 (2017)

  10. Hudzik, H., Kurc, W.: Monotonicity properties of Musielak–Orlicz spaces and dominated best approximation in Banach lattices. J. Approx. Theory 95(3), 353–368 (1998)

    Article  MathSciNet  MATH  Google Scholar 

  11. Hudzik, H., Liu, X., Wang, T.: Points of monotonicity in Musielak–Orlicz function spaces endowed with the Luxemburg norm. Arch. Math. 82(6), 534–545 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  12. Kaczmarek, R.: Some monotonicity properties in \(F\)-normed Musielak–Orlicz spaces. Aequat. Math. 94(5–6), 865–885 (2020)

    Article  MathSciNet  MATH  Google Scholar 

  13. Kalton, N.J., Peck, N.T., Roberts, J.W.: An F-space sampler. Cambridge University Press, Cambridge (1984)

    Book  MATH  Google Scholar 

  14. Kantorovich, L.V., Akilov, G.P.: Functional Analysis, 2nd edn. Pergamon Press, Oxford (1982). (English translation)

    MATH  Google Scholar 

  15. Kurc, W.: Strictly and uniformly monotone Musielak–Orlicz spaces and applications to best approximation. J. Approx. Theory 69(2), 173–187 (1992)

    Article  MathSciNet  MATH  Google Scholar 

  16. Kurc, W.: Strictly and uniformly monotone sequential Musielak–Orlicz spaces. Collect. Math. 50(1), 1–18 (1999)

    MathSciNet  MATH  Google Scholar 

  17. Mazur, S., Orlicz, W.: On some classes of linear spaces. Stud. Math. 17(1), 97–119 (1958); reprinted in: W. Orlicz, Collected Papers, PWN, Warszawa, 981–1003 (1988)

  18. Musielak, J.: Orlicz Spaces and Modular Spaces. Lecture Notes in Math, vol. 1034. Springer, Berlin (1983)

    MATH  Google Scholar 

  19. Musielak, J., Orlicz, W.: On modular spaces. Stud. Math. 18(1), 49–65 (1959)

    Article  MathSciNet  MATH  Google Scholar 

Download references

Acknowledgements

We are very grateful to the reviewer for good suggestions in the paper. Your suggestions greatly improved the accuracy and completeness of the manuscript. We would like to extend our gratitude to all of the experts who dedicated their time and expertise to the paper.

Funding

Funding was provided by National Natural Science Foundation of China (Grant No. 11871181).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Yunan Cui.

Ethics declarations

Conflict of interest

No potential conflict of interest was declared by the authors. All data generated or analysed during this study are included in this published article (and its supplementary information files).

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yang, Y., Cui, Y. & Kaczmarek, R. Points of monotonicity in F-normed Orlicz function spaces. Aequat. Math. 97, 659–682 (2023). https://doi.org/10.1007/s00010-023-00961-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00010-023-00961-2

Keywords

Mathematics Subject Classification

Navigation