Research Article
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Year 2025, Volume: 54 Issue: 6 , 2237 - 2243 , 30.12.2025
https://doi.org/10.15672/hujms.1378317
https://izlik.org/JA78TB98NL

Abstract

Project Number

11771126

References

  • [1] J. Alonso, P. Martin and P. L. Papini, Wheeling around von Neumann-Jordan constant in Banach spaces, Studia Math. 188, 135–150, 2008.
  • [2] J. A. Clarkson, The von Neumann-Jordan constant for the Lebesgue space, Ann. Math. 38, 114–115, 1937.
  • [3] Y. Cui, W. Huang, H. Hudzik and R. Kaczmarek, Generalized von Neumann-Jordan constant and its relationship to the fixed point property, Fixed Point Theory Appl. 40, 1–11, 2015.
  • [4] M. Kato, L. Maligranda and Y. Takahashi, On James and Jordan-von Neumann constant and the normal structure coefficient of Banach spaces, Studia Math. 144, 275–295, 2001.
  • [5] H. Li, X. Yang and C. Yang, On (n, p)-th von Neumann-Jordan constants for Banach spaces, Math. Inequal. Appl. 27 (3), 583-600, 2024.
  • [6] Q. Liu and Y. Li, On a new geometric constant related to the Euler-Langrange type identity in Banach spaces, Mathematics 116, 1–12, 2021.
  • [7] Q. Liu, C. Zhou, M. Sarfraz and Y. Li, On new moduli related to the generalization of the Parallelogram law, Bull. Malays. Math. Sci. Soc. 45, 307–321, 2022.
  • [8] K.-I Mitani, K.-S. Satio, On von Neuman-Jordan constant of generalized Banas- Fr¸aczek spaces II, Linear Nonlinear Anal. 8, 217–223, 2022.
  • [9] K.-I Mitani, K.-S. Satio and Y. Takahashi, On the von Neuman-Jordan constant of generalized Banas-Fr¸aczek spaces, Linear Nonlinear Anal. 2, 311–316, 2016.
  • [10] K. Naoto, K. S. Saito and K. I. Mitani, Extremal structure of the set of absolute norms on $R^{2}$ and the von Neumann-Jordan constant, J. Math. Anal. Appl. 370, 101–106, 2010.
  • [11] F. Wang. On the James and von Neumann-Jordan constants in Banach spaces. Proc. Amer. Math. Soc. 138, 695–701, 2010.
  • [12] C. Yang. Jordan-von Neumann constant for Banas-Fr¸aczek space. Banach J. Math. Anal. 8, 185–192, 2014.
  • [13] C. Yang and H. Li, An inequality between Jordan-von Neumann constant and James constant, Appl. Math. Lett. 23, 227–281, 2010.
  • [14] C. Yang and F. Wang, The von Neumann-Jordan constant for a class of Day-James spaces, Mediterr. J. Math. 13, 1127–1133, 2016.
  • [15] C. Yang and F. Wang, An extension of a simple inequality between von Neumann- Jordan and James constants in Banach spaces, Acta Mathematica Sinica Engl. Ser., 33, 1287–1296, 2017.
  • [16] C. Yang and T. Wang, Generalized von Neumann-Jordan constant $C_{NJ}^{(p)}(X)$ for the regular octagon spaces, Math. Inequal. Appl. 20, 483–490, 2017.
  • [17] C. Yang and X. Yang, On the James type constant and von Neumann-Jordan constant for a class of the Banas-Fraczek space, J. Math. Inequal. 10, 551–558, 2016.
  • [18] X. Yang and C. Yang. An inequality between $L_{YJ}(\lambda,\mu, X)$ constant and generalized James Constant. Math. Inequal. Appl. 27, 571–581, 2024.
  • [19] Z. Zuo and C. Tang, On James and Jordan-von Neumann type constants and normal structure in Banach spaces. Topol. Methods Nonlinear Anal. 49, 615–623, 2017.
  • [20] Z. Zuo, L. Wang, Y. Zhao and Y. Wu. On the generalized von Neumann-Jordan type constant for some concrete Banach spaces. Math. Inequal. Appl. 24, 597–615, 2021.
  • [21] Z. Zuo, Y. Huang and J.Wang, The generalized Gao’s constant of absolute normalized norms in $\mathbb{R}^{2}$. Math. Inequal. Appl. 26, 109–129, 2023.

On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek

Year 2025, Volume: 54 Issue: 6 , 2237 - 2243 , 30.12.2025
https://doi.org/10.15672/hujms.1378317
https://izlik.org/JA78TB98NL

Abstract

In this paper, we study the generalized von Neumann-Jordan constant $C^{(p)}_{NJ}(X)$ for the generalized Banas-Fraczek space and improve related results on the Banas-Fraczek space. The exact value of $C^{(p)}_{NJ}(X)$ will be calculated for $X$ to be the generalized Banas-Fraczek space $\mathbb{R}^2_{a,b,p_1}$ in the case $p\geq2$ such that $p_1\geq p\geq2$ or $p\geq p_1 \geq1$.

Project Number

11771126

References

  • [1] J. Alonso, P. Martin and P. L. Papini, Wheeling around von Neumann-Jordan constant in Banach spaces, Studia Math. 188, 135–150, 2008.
  • [2] J. A. Clarkson, The von Neumann-Jordan constant for the Lebesgue space, Ann. Math. 38, 114–115, 1937.
  • [3] Y. Cui, W. Huang, H. Hudzik and R. Kaczmarek, Generalized von Neumann-Jordan constant and its relationship to the fixed point property, Fixed Point Theory Appl. 40, 1–11, 2015.
  • [4] M. Kato, L. Maligranda and Y. Takahashi, On James and Jordan-von Neumann constant and the normal structure coefficient of Banach spaces, Studia Math. 144, 275–295, 2001.
  • [5] H. Li, X. Yang and C. Yang, On (n, p)-th von Neumann-Jordan constants for Banach spaces, Math. Inequal. Appl. 27 (3), 583-600, 2024.
  • [6] Q. Liu and Y. Li, On a new geometric constant related to the Euler-Langrange type identity in Banach spaces, Mathematics 116, 1–12, 2021.
  • [7] Q. Liu, C. Zhou, M. Sarfraz and Y. Li, On new moduli related to the generalization of the Parallelogram law, Bull. Malays. Math. Sci. Soc. 45, 307–321, 2022.
  • [8] K.-I Mitani, K.-S. Satio, On von Neuman-Jordan constant of generalized Banas- Fr¸aczek spaces II, Linear Nonlinear Anal. 8, 217–223, 2022.
  • [9] K.-I Mitani, K.-S. Satio and Y. Takahashi, On the von Neuman-Jordan constant of generalized Banas-Fr¸aczek spaces, Linear Nonlinear Anal. 2, 311–316, 2016.
  • [10] K. Naoto, K. S. Saito and K. I. Mitani, Extremal structure of the set of absolute norms on $R^{2}$ and the von Neumann-Jordan constant, J. Math. Anal. Appl. 370, 101–106, 2010.
  • [11] F. Wang. On the James and von Neumann-Jordan constants in Banach spaces. Proc. Amer. Math. Soc. 138, 695–701, 2010.
  • [12] C. Yang. Jordan-von Neumann constant for Banas-Fr¸aczek space. Banach J. Math. Anal. 8, 185–192, 2014.
  • [13] C. Yang and H. Li, An inequality between Jordan-von Neumann constant and James constant, Appl. Math. Lett. 23, 227–281, 2010.
  • [14] C. Yang and F. Wang, The von Neumann-Jordan constant for a class of Day-James spaces, Mediterr. J. Math. 13, 1127–1133, 2016.
  • [15] C. Yang and F. Wang, An extension of a simple inequality between von Neumann- Jordan and James constants in Banach spaces, Acta Mathematica Sinica Engl. Ser., 33, 1287–1296, 2017.
  • [16] C. Yang and T. Wang, Generalized von Neumann-Jordan constant $C_{NJ}^{(p)}(X)$ for the regular octagon spaces, Math. Inequal. Appl. 20, 483–490, 2017.
  • [17] C. Yang and X. Yang, On the James type constant and von Neumann-Jordan constant for a class of the Banas-Fraczek space, J. Math. Inequal. 10, 551–558, 2016.
  • [18] X. Yang and C. Yang. An inequality between $L_{YJ}(\lambda,\mu, X)$ constant and generalized James Constant. Math. Inequal. Appl. 27, 571–581, 2024.
  • [19] Z. Zuo and C. Tang, On James and Jordan-von Neumann type constants and normal structure in Banach spaces. Topol. Methods Nonlinear Anal. 49, 615–623, 2017.
  • [20] Z. Zuo, L. Wang, Y. Zhao and Y. Wu. On the generalized von Neumann-Jordan type constant for some concrete Banach spaces. Math. Inequal. Appl. 24, 597–615, 2021.
  • [21] Z. Zuo, Y. Huang and J.Wang, The generalized Gao’s constant of absolute normalized norms in $\mathbb{R}^{2}$. Math. Inequal. Appl. 26, 109–129, 2023.
There are 21 citations in total.

Details

Primary Language English
Subjects Operator Algebras and Functional Analysis
Journal Section Research Article
Authors

Haiying Li 0009-0001-5860-2982

Xiangrun Yang 0009-0009-1191-0580

Changsen Yang 0000-0002-8333-3390

Project Number 11771126
Submission Date October 19, 2023
Acceptance Date March 6, 2025
Early Pub Date April 11, 2025
Publication Date December 30, 2025
DOI https://doi.org/10.15672/hujms.1378317
IZ https://izlik.org/JA78TB98NL
Published in Issue Year 2025 Volume: 54 Issue: 6

Cite

APA Li, H., Yang, X., & Yang, C. (2025). On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek. Hacettepe Journal of Mathematics and Statistics, 54(6), 2237-2243. https://doi.org/10.15672/hujms.1378317
AMA 1.Li H, Yang X, Yang C. On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek. Hacettepe Journal of Mathematics and Statistics. 2025;54(6):2237-2243. doi:10.15672/hujms.1378317
Chicago Li, Haiying, Xiangrun Yang, and Changsen Yang. 2025. “On the Constant ${C^{(p)}_{NJ}(X)}$ for the Generalized Banas-Fraczek”. Hacettepe Journal of Mathematics and Statistics 54 (6): 2237-43. https://doi.org/10.15672/hujms.1378317.
EndNote Li H, Yang X, Yang C (December 1, 2025) On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek. Hacettepe Journal of Mathematics and Statistics 54 6 2237–2243.
IEEE [1]H. Li, X. Yang, and C. Yang, “On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek”, Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 6, pp. 2237–2243, Dec. 2025, doi: 10.15672/hujms.1378317.
ISNAD Li, Haiying - Yang, Xiangrun - Yang, Changsen. “On the Constant ${C^{(p)}_{NJ}(X)}$ for the Generalized Banas-Fraczek”. Hacettepe Journal of Mathematics and Statistics 54/6 (December 1, 2025): 2237-2243. https://doi.org/10.15672/hujms.1378317.
JAMA 1.Li H, Yang X, Yang C. On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek. Hacettepe Journal of Mathematics and Statistics. 2025;54:2237–2243.
MLA Li, Haiying, et al. “On the Constant ${C^{(p)}_{NJ}(X)}$ for the Generalized Banas-Fraczek”. Hacettepe Journal of Mathematics and Statistics, vol. 54, no. 6, Dec. 2025, pp. 2237-43, doi:10.15672/hujms.1378317.
Vancouver 1.Haiying Li, Xiangrun Yang, Changsen Yang. On the constant ${C^{(p)}_{NJ}(X)}$ for the generalized Banas-Fraczek. Hacettepe Journal of Mathematics and Statistics. 2025 Dec. 1;54(6):2237-43. doi:10.15672/hujms.1378317