Some critical remarks on the paper “A note on the metrizability of tvs-cone metric spaces”

  • Suzana M. Aleksić Univerzitet u Kragujevcu, Prirodno-matematički fakultet
  • Ljiljana R. Paunović University of Priština - Kosovska Mitrovica, Faculty of Education in Prizren - Leposavić, Leposavić
  • Stojan N. Radenović University of Belgrade, Faculty of Mechanical Engineering, Belgrade
  • Francesca Vetro University of Palermo, Department of Energy, Information Engineering and Mathematical Models (DEIM), Palermo
Keywords: tvs-cone metric space, metrizable, solid, normal, non-normal,

Abstract


This short and concise note provides a detailed exposition of the approach and results established by Shou Lin et al (Lin et al, 2015, pp.271-279). We show that the obtained results are not particularly surprising and new. Namely, using an old result due to K. Deimling it is indicated that tvs-cone metric spaces over solid cones are actually cone metric spaces over normal solid cones. Hence, there are only cone metric spaces over normal solid cones or over normal non-solid cones. One question still unanswered is whether an ordered topological vector space with a non-normal non-solid cone exists.

References

Alnafei, S.H., Radenović, S., & Shahzad, N., 2011. Fixed point theorems for mappings with convex diminishing diameters on cone metric spaces. Appl. Math. Lett., 24 (2), pp.2162-2166. Available at: https://doi.org/10.1016/j.aml.2011.06.019.

Amini-Harandi, A., & Fakhar, M., 2010. Fixed point theory in cone metric spaces obtained via the scalarization method. Comput. Math. Appl., 59 (11), pp.3529-3534. Available at: https://doi.org/10.1016/j.camwa.2010.03.046.

Ansari, A.H., Chandok, S., Hussain, N., & Paunović, L., 2016. Fixed point of weak contractions in regular cone. Journal of Advanced Mathematical Studies, 9 (1), pp.72-82.

Deimling, K., 1985. Nonlinear Functional Analysis.Springer- Verlag.

Du, W.S., 2010. A note on cone metric fixed point theory and its equivalence. Nonlinear Anal., 72 (5), pp.2259-2261. Available at: https://doi.org/10.1016/j.na.2009.10.026.

Đorđević, M., Đorić, D., Kadelburg, Z., Radenović, S., & Spasić, D., 2011. Fixed point results under C-distance in TVS- cone metric spaces. Fixed Point Theory and Applications, 2011:29. Available at: https://doi.org/10.1186/1687-1812-2011-29.

Filipović, M., Paunović, Radenović, S., & Rajović, M., 2011. Remarks on ˝Cone Metric Spaces and Fixed Point Theorems of T-Kannan Contractive Mappings˝. Mathematical and Computer Modelling, 54 (5-6). Available at: https://doi.org/10.1016/j.mcm.2011.04.018.

Huang, L.G., & Zhang, X., 2007. Cone metric spaces and fixed point theorems of contractive mappings. J. Math. Anal. Appl., 332 (2), pp.1468-1476. Available at: https://doi.org/10.1016/j.jmaa.2005.03.087.

Jachymski, J., & Klima, J., 2016. Cantor's intersection theorem for K-metric spaces with a solid cone and a contraction principle. J. Fixed Point Theory Appl., 18 (3), pp.445-463. Available at: https://doi.org/10.1007/s11784-016-0312-1.

Janković, S., Kadelburg, Z., & Radenović, S., 2011. On cone metric spaces: A survey. Nonlinear Anal., 74 (7), pp.2591-2601. Available at: https://doi.org/10.1016/j.na.2010.12.014.

Kadelburg, Z., Paunović, L., Radenović, S., & Rad, G.S., 2016. Non-normal cone metric and cone b-metric spaces and fixed point results. Scientific publications of the state University of Novi Pazar, Ser. A: Appl. Math. Inform. And Mech., 8 (2), pp.177-186. Available at: https://doi.org/10.5937/SPSUNP1602177K.

Kadelburg, Z., Radenović, S., & Rakočević, V., 2011. A note on the equivalence of some metric and cone metric fixed point results. Appl. Math. Lett., 24 (3), pp.370-374. Available at: https://doi.org/10.1016/j.aml.2010.10.030.

Khani, M., & Pourmahdian, M., 2011. On the metrizability of cone metric space. Topology Appl., 158 (2), pp.190-193. Available at: https://doi.org/10.1016/j.topol.2010.10.016.

Köthe, G., 1969. Topological Vector Spaces I.New York: Springer-Verlag, Inc..

Lin, S., Li, K., & Ge, Y., 2015. On the metrizability of tvs-cone metric spaces, Publication de l'Institut Mathématique. Nouvelle série, tome, 98 (112), pp.271-279. Available at: https://doi.org/10.2298/PIM1512271L.

Radenović, S., Vetro, F., & Xu, S., 2017. Some new results on perov type mappings. J. Adv. Math. Stud., 10(3), pp.396-409.

Shaefer, H.H., 1971. Topological Vector Spaces, 3rd ed.New York: Springer.

Simić, S., 2011. A note on Stone's, Baire's, Ky Fan's and Dugundji's theorem in tvs-cone metric spaces. Appl. Math. Lett., 24 (6), pp.999-1002. Available at: https://doi.org/10.1016/j.aml.2011.01.014.

Vandergraft, J.S., 1967. Newton's method for convex operators in partially ordered spaces. SIAM J. Num. Anal., 4 (3), pp.406-432. Available at: https://doi.org/10.1137/0704037.

Wong, Y.C., & Ng, K.F., 1973. Partially Ordered Topological Vector Spaces.Oxford: Claredon Press.

Xu, S., & Radenović, S., 2014. Fixed point theorems of generalized Lipschitz mappings on cone metric spaces over Banach algebras without assumption of normality. Fixed Point Theory Appl., 2014:102. Available at: https://doi.org/10.1186/1687-1812-2014-102.

Xu, S., Dolićanin, Ć., & Radenović, S., 2016. Some remarks on results of Perov type. J. Adv. Math. Stud., 9 (3), pp.361-369.

Zabrejko, P.P., 1997. K-metric and K-normed linear spaces, survey. Collect. Math., 48, pp.825-859.

Published
2017/12/21
Section
Original Scientific Papers