Skip to main content
Log in

The concept of coordinate strongly convex functions and related inequalities

  • Original Paper
  • Published:
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas Aims and scope Submit manuscript

Abstract

In this paper, we introduce a new class of functions known as coordinate strongly convex functions. We discuss the relation between strongly convex functions and coordinate strongly convex functions. Also, we present some natural properties of coordinate strongly convex functions. We present Slater’s, Jensen’s and converse of the Jensen inequalities in discrete as well as integral versions for coordinate strongly convex functions. Furthermore, we present Hermite–Hadamard’s type inequalities for coordinate strongly convex functions.

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. Abramovich, S.: Convexity, subadditivity and generalized Jensen’s inequality. Ann. Funct. Anal. 4, 183–194 (2013)

    Article  MathSciNet  MATH  Google Scholar 

  2. Adamek, M.: On a problem connected with strongly convex functions. Math. Inequal. Appl. 19(4), 1287–1293 (2016)

    MathSciNet  MATH  Google Scholar 

  3. Anastassiou, G.A.: Basic and \(s\)-convexity Ostrowski and Grüss type inequalities involving several functions. Commun. Appl. Anal. 17, 189–212 (2013)

    MathSciNet  MATH  Google Scholar 

  4. Adil Khan, M., Ali, T., Kiliçman, A., Din, Q.: Refinements of Jensen’s inequality for convex functions on the co-ordinates in a rectangle from the plane. Filomat. 3(30), 803–814 (2016)

    Article  MathSciNet  MATH  Google Scholar 

  5. Adil Khan, M., Khan, G. A., Ali, T., Batbold, T., Kiliçman, A.: Further refinement of Jensen’s type inequalities for the function defined on the rectangle, Abstr. Appl. Anal. 1–8 (2013)

  6. Adil Khan, M., Khan, G.A., Ali, T., Kiliçman, A.: On the refinement of Jensen’s inequality. Appl. Math. Comput. 262, 128–135 (2015)

    MathSciNet  MATH  Google Scholar 

  7. Adil Khan, M., Khan, J., Pečarić, J.: Generalization of Jensen’s and Jensen-Steffensen’s inequalities by generalized majorization theorem. J. Math. Inequal. 11(4), 1049–1074 (2017)

    Article  MathSciNet  MATH  Google Scholar 

  8. Adil Khan, M., Pečarić, J.: On Slater’s integral inequality. J. Math. Inequal. 5(2), 231–241 (2011)

    Article  MathSciNet  MATH  Google Scholar 

  9. Adil Khan, M., Zaheer Ullah, S., Reza Moradi, Hamid.: Jensen type inequalities for strongly convex functions, (submitted)

  10. Banić, S., Bakula, M.K.: Jensen’s inequality for functions superquadratic on the coordinates. J. Math. Inequal. 9(4), 1365–1375 (2015)

    MathSciNet  MATH  Google Scholar 

  11. Bakula, M.K., Nikodem, K.: On the converse Jensen inequality for strongly convex functions. J. Math. Anal. Appl. 434, 516–522 (2016)

    Article  MathSciNet  MATH  Google Scholar 

  12. Bakula, M.K., Pečarić, J.: On the Jensen’s inequality for convex functions on the co-ordinates in a rectangle from the plane. Taiwanese J. Math. 10, 1271–1292 (2006)

    Article  MathSciNet  MATH  Google Scholar 

  13. Definetti, B.: Sulla stratificazioni convesse. Ann. Math. Pura. Appl. 30, 173–183 (1949)

    Article  Google Scholar 

  14. Dragomir, S.S.: On the Hadamard’s inequality for convex functions on the co-ordinates in a rectangle from the plane. Taiwanese J. Math. 5, 775–778 (2001)

    Article  MathSciNet  MATH  Google Scholar 

  15. Dragomir, S. S.: Inequalities of Hermite-Hadamard type for \(\varphi \)-convex functions, Preprint RGMIA Res. Rep. Coll. 16, 14, Art. 87, (2013). http://rgmia.org/papers/v16/v16a87.pdf

  16. Dragomir, S. S.: Inequalities of Hermite–Hadamard type for \(\lambda \)-convex functions on linear spaces, Preprint RGMIA Res. Rep. Coll. 17, 18 Art. 13, (2014). http://rgmia.org/papers/v17/v17a13.pdf

  17. Dragomir, S.S., Adil Khan, M., Abathun, A.: Refinement of Jensen’s integral inequality. Open Math. 14, 221–228 (2016)

    MathSciNet  MATH  Google Scholar 

  18. Hyers, D.H., Ulam, S.M.: Approximately convex functions. Proc. Am. Math. Soc. 3, 821–828 (1952)

    Article  MathSciNet  MATH  Google Scholar 

  19. Jensen, J.L.W.V.: On konvexe funktioner og uligheder mellem middlvaerdier. Nyt. Tidsskr. Math. B. 16, 49–69 (1905)

    MATH  Google Scholar 

  20. Mangasarian, O.L.: Pseudo-Convex functions. SIAM J. Control 3, 281–290 (1965)

    MathSciNet  MATH  Google Scholar 

  21. Merentes, N., Nikodem, K.: Remarks on strongly convex functions. Aequat. Math. 80, 193–199 (2010)

    Article  MathSciNet  MATH  Google Scholar 

  22. Moradi, H. R., Omidvar, M. E., Adil Khan, M., Nikodem, K.: Around Jensen’s inequality for strongly convex functions, Aequat. Math. (2017). https://doi.org/10.1007/s00010-017-0496-5

  23. Nikodem, K.: On Strongly Convex Functions and Related Classes of Functions. Handbook of Functional Equations, pp. 365–405. Springer, New York (2014)

    MATH  Google Scholar 

  24. Özdemir, M.E., Avci, M., Kavurmaci, H.: Hermite–Hadamard-type inequalities via \((\alpha, m)\)-convexity. Comput. Math. Appl. 61, 2614–2620 (2011)

    Article  MathSciNet  MATH  Google Scholar 

  25. Polyak, B.T.: Existence theorems and convergence of minimizing sequences in extremum problems with restrictions. Sov. Math. Dokl. 7, 72–75 (1966)

    Google Scholar 

  26. Pečarić, J., Proschan, F., Tong, Y.L.: Convex functions, partial orderings, and statistical applications. Academic Press, New York (1992)

    MATH  Google Scholar 

  27. Song, Y-Qing., Adil Khan, M., Zaheer Ullah, S., Chu, Yu-Ming.: Integral inequalities involving strongly convex functions, Journal of Function Spaces. 2018 (2018) Article ID 6595921

  28. Rajba, T.: On strong delta-convexity and Hermite-Hadamard type inequalities for delta-convex functions of higher order. Math. Inequal. Appl. 18, 267–293 (2015)

    MathSciNet  MATH  Google Scholar 

  29. Roberts, A.W., Varberg, D.E.: Convex Functions. Academic Press, NewYork (1973)

    MATH  Google Scholar 

  30. Set, E., Özdemir, M. E., Dragomir, S. S.: On Hadamard-type inequalities involving several kinds of convexity. J. Inequal. Appl. 12 (2010) Art. ID 286845

  31. Varošanec, S.: On \(h\)-convexity. J. Math. Anal. Appl. 326, 303–311 (2007)

    Article  MathSciNet  MATH  Google Scholar 

Download references

Acknowledgements

The research was supported by the Natural Science Foundation of China (Grant Nos. 61373169, 11701176, 11601485 ) and the Science and Technology Research Program of Zhejiang Educational Committee (Grant no. Y201635325). The third author Yu-Ming Chu is the corresponding author of the article. The authors would like to express their sincere thanks to anonymous referees for their valuable suggestions and comments which helped the authors to improve this article substantially.

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Muhammad Adil Khan or Yu-Ming Chu.

Additional information

Publisher's Note

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

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Adil Khan, M., Ullah, S.Z. & Chu, YM. The concept of coordinate strongly convex functions and related inequalities. RACSAM 113, 2235–2251 (2019). https://doi.org/10.1007/s13398-018-0615-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s13398-018-0615-8

Keywords

Mathematics Subject Classification

Navigation