DOI QR코드

DOI QR Code

EXTENSIONS OF MINIMIZATION THEOREMS AND FIXED POINT THEOREMS ON A $D^*$-METRIC SPACE

  • Park, Sung-Bok (Department of Applied Mathematics, Changwon National University) ;
  • Ume, Jeong-Sheok (Department of Applied Mathematics, Changwon National University)
  • Received : 2010.06.29
  • Accepted : 2011.02.15
  • Published : 2011.02.28

Abstract

In this paper, we introduce the new concept of ${\omega}-D^*$-distance on a $D^*$-metric space and prove a non-convex minimization theorem which improves the result of Caristi[1], ${\'{C}}iri{\'{c}}$[2], Ekeland[4], Kada et al.[5] and Ume[8, 9].

Keywords

References

  1. J. Caristi: Fixed point theorems for mappings satisfying inwardness conditions. Tran. Amer. Math. Soc. 215 (1976), 241-251. https://doi.org/10.1090/S0002-9947-1976-0394329-4
  2. Lj. B. Ciric: A generalization of Banach's contraction principle. Proc. Amer. Math. Soc., 45 (1974), no. 2, 267-273.
  3. B.C. Dhage: A common fixed point principle in D-metric spaces. Bull. Calcutta Math. Soc. 91 (1999), no. 6, 475-480.
  4. I. Ekeland: Nonconvex minimization problems. Bull. Amer. Math. Soc. 1 (1979), no. 3, 443-474. https://doi.org/10.1090/S0273-0979-1979-14595-6
  5. O. Kada, T. Suzuki & W. Takahashi: Nonconvex minimization theorems and fixed point theorems in complete metric spaces. Mathematica Japonica 44 (1996), no. 2, 381-391.
  6. S. Sedghi, N. Shobe & H. Zhou: A Common Fixed point theorem in $D^{\ast}-metric$ spaces. Fixed point theory and Applications, vol. 2007, Article ID 27906, 13pages, 2007. https://doi.org/10.1155/2007/27906
  7. W. Takahashi: Minimization theorems and fixed point theorems. in Nonlinear Analysis and Mathematical Economics, T. Maruyama, Ed., pp. 175-191, RIMS, Kyoto University, Kyoto, Japan, 1993.
  8. J.S. Ume: Some existence theorems generalizing fixed point theorems on complete metric spaces. Mathematica Japonica 40 (1994), no. 1, 109-114.
  9. J.S. Ume: Fixed point theorems related to Ciric's contraction principle. J. Math. Anal. Appl. 225 (1998), no. 2, 630-640. https://doi.org/10.1006/jmaa.1998.6030