Expanded Rectangular b-Metric Spaces and Fixed Point Results for Nonlinear F-Contractions

Authors

  • Chol Jin Kil Faculty of Applied Mathematics, Kim Chaek University of Technology, Pyongyang, Democratic People’s Republic of Korea
  • Un-A Ri Department of Mathematics, Kim Chol Ju University of Education, Pyongyang, Democratic People’s Republic of Korea
  • Song-Gyong Ri Faculty of Applied Mathematics, Kim Chaek University of Technology, Pyongyang, Democratic People’s Republic of Korea
  • Un-Hye Ku Faculty of Applied Mathematics, Kim Chaek University of Technology, Pyongyang, Democratic People’s Republic of Korea

Keywords:

fixed point, expanded rectangular b-metric space, F-contraction, nonlinear F-contraction

Abstract

The generalization of metric space is one of research directions that focus on fixed point theory. Recently, many generalizations of metric spaces have been introduced and the related fixed point results in these abstract spaces have been established. In this paper, we introduce a new concept called expanded rectangular b-metric space by combining the ideas of expanded b-metric space and rectangular metric space. We claim that expanded rectangular b-metric space is another generalization of metric space, b-metric space, expanded b-metric space, rectangular metric space, and rectangular b-metric space, and we give examples to illustrate this. We also prove fixed point result of nonlinear F-contractions under weaker assumptions in such metric spaces. Our fixed point results generalize and improve many of the previous well-known fixed point results. Finally, we apply obtained result to consider the existence of solutions for nonlinear integral equation.

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Published

2026-05-08

How to Cite

Expanded Rectangular b-Metric Spaces and Fixed Point Results for Nonlinear F-Contractions. (2026). Journal of Prime Research in Mathematics, 22(1), 145-156. https://jprm.sms.edu.pk/index.php/jprm/article/view/339