Abstract
This paper is a continuation of [Bisht, R. K.—Rakočević, V.: Generalized Meir-Keeler type contractions and discontinuity at fixed point, Fixed Point Theory 19(1) (2018), 57–64]. We obtain some fixed point theorems under contractive conditions which admit discontinuity at the fixed point. Our results subsume all the known results of similar type, provide new answers to the question of continuity of contractive mappings at their fixed points, and also rectify some recent results by Bisht and Rakočević. Many examples are given to illustrate our results.
The first author is thankful to Professor M. C. Josh for his valuable suggestions. The third author was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia, Grant No. 174025.
Communicated by Gregor Dolinar
Acknowledgement
The authors thank the referee for his valuable suggestions for improving the presentation.
References
[1] Banach, S.: Sur les operations dans les ensembles abstraits et leur application aux equations integrals, Fund. Math. 3 (1922), 133–181.10.4064/fm-3-1-133-181Search in Google Scholar
[2] Bisht, R. K.—Pant, R. P.: A remark on discontinuity at fixed point, J. Math. Anal. Appl. 445 (2017), 1239–1242.10.1016/j.jmaa.2016.02.053Search in Google Scholar
[3] Bisht, R. K.—Rakočević, V.: Generalized Meir-Keeler type contractions and discontinuity at fixed point, Fixed Point Theory 19(1) (2018), 57–64.10.24193/fpt-ro.2018.1.06Search in Google Scholar
[4] Boyd, D. W.—Wong, J. S.: On nonlinear contractions, Proc. Amer. Math. Soc. 20 (1969), 458–464.10.1090/S0002-9939-1969-0239559-9Search in Google Scholar
[5] Ding, X.—Cao, J.—Zhao, X.—Alsaadi, F. E.: Mittag-Leffler synchronization of delayed fractional-order bidirectional associative memory neural networks with discontinuous activations: state feedback control and impulsive control schemes, Proc. Royal Soc. A: Math. Engg. Phys. Sci (2017), 10.1098/rspa.2017.0322.Search in Google Scholar
[6] Forti, M.—Nistri, P.: Global convergence of neural networks with discontinuous neuron activations, IEEE Trans. Circuits Syst. I, Fundam. Theory Appl. 50(11) (2003), 1421–1435.10.1109/TCSI.2003.818614Search in Google Scholar
[7] Kannan, R.: Some results on fixed points, Bull. Calcutta Math. Soc. 60 (1968), 71–76.10.2307/2316437Search in Google Scholar
[8] Kannan, R.: Some results on fixed points-II, Amer. Math. Monthly 76 (1969), 405–408.10.1080/00029890.1969.12000228Search in Google Scholar
[9] Meir, A.—Keeler, E.: A theorem on contraction mappings, J. Math. Anal. Appl. 28 (1969), 326–329.10.1016/0022-247X(69)90031-6Search in Google Scholar
[10] Nie, X.—Zheng, W. X.: On multistability of competitive neural networks with discontinuous activation functions. 4th Australian Control Conference (AUCC), 2014, pp. 245–250.10.1109/AUCC.2014.7358690Search in Google Scholar
[11] Nie, X.—Zheng, W. X: Multistability of neural networks with discontinuous non-monotonic Piecewise linear activation functions and time-varying delays, Neural Networks 65 (2015), 65–79.10.1016/j.neunet.2015.01.007Search in Google Scholar PubMed
[12] Nie, X.—Zheng, W. X.: Dynamical behaviors of multiple equilibria in competitive neural networks with discontinuous nonmonotonic piecewise linear activation functions, IEEE Transactions en Cybernetics, accepted.10.1109/TCYB.2015.2413212Search in Google Scholar PubMed
[13] Ozgur, N. Y.—Tas, N.: Some fixed-circle theorems on metric spaces, Bull. Malays. Math. Sci. Soc. (2017), 10.1007/s40840-017-0555-z.Search in Google Scholar
[14] Ozgur, N. Y.—Tas, N.: Some fixed-circle theorems and discontinuity at fixed circle, AIP Conference Proceedings 1926, 020048 (2018), 10.1063/1.5020497.Search in Google Scholar
[15] Pant, A.—Pant, R. P.: Fixed points and continuity of contractive maps, Filomat 31(11) (2017), 3501–3506.10.2298/FIL1711501PSearch in Google Scholar
[16] Pant, R. P.: Discontinuity and fixed points, J. Math. Anal. Appl. 240 (1999), 284–289.10.1006/jmaa.1999.6560Search in Google Scholar
[17] Pant, R. P.—Ozgur, N. Y.—Tas, N.: On discontinuity problem at fixed point, Bull. Malays. Math. Sci. Soc. (2018), 10.1007/s40840-018-0698-6.Search in Google Scholar
[18] Rashid, M.—Batool, I.—Mehmood, N.: Discontinuous mappings at their fixed points and common fixed points with applications, J. Math. Anal. 9(1) (2018), 90–104.Search in Google Scholar
[19] Rhoades, B. E.: A comparison of various definitions of contractive mappings, Trans. Amer. Math. Soc. 226 (1977), 257–29010.1090/S0002-9947-1977-0433430-4Search in Google Scholar
[20] Rhoades, B. E.: Contractive definitions and continuity, Contemp. Math. 72 (1988), 233–245.10.1090/conm/072/956495Search in Google Scholar
[21] Tas, N.—Ozgur, N. Y.: A new contribution to discontinuity at fixed point, arXiv:1705.03699v2.Search in Google Scholar
[22] Wu, H.—Shan, C.: Stability analysis for periodic solution of BAM neural networks with discontinuous neuron activations and impulses, Appl. Math. Modelling 33(6) (2017), 2564–2574.10.1016/j.apm.2008.07.022Search in Google Scholar
© 2019 Mathematical Institute Slovak Academy of Sciences
Articles in the same Issue
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- On Diophantine equation x4 + y4 = n(u4 + v4)
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- Preservation of Rees exact sequences
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- Asymptotic properties of noncanonical third order differential equations
- Existence and regularity results for unilateral problems with degenerate coercivity
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- Best proximity points for a new type of set-valued mappings
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- Fixed point results for F𝓡-generalized contractive mappings in partial metric spaces
- Einstein-Weyl structures on trans-Sasakian manifolds
- Characterizations of linear Weingarten space-like hypersurface in a locally symmetric Lorentz space
- ∗-Ricci solitons and gradient almost ∗-Ricci solitons on Kenmotsu manifolds
- Uncorrelatedness sets of discrete random variables via Vandermonde-type determinants
- A note on the consistency of wavelet estimators in nonparametric regression model under widely orthant dependent random errors
- On adaptivity of wavelet thresholding estimators with negatively super-additive dependent noise
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Articles in the same Issue
- Regular papers
- RNDr. Kvetoslava Dvořáková passed away
- On the Riesz structures of a lattice ordered abelian group
- On Diophantine equation x4 + y4 = n(u4 + v4)
- On a Waring-Goldbach problem involving squares and cubes
- D(n)-quadruples in the ring of integers of ℚ(√2, √3)
- Geometry of ℙ2 blown up at seven points
- Preservation of Rees exact sequences
- Pointwise multipliers between weighted copson and cesàro function spaces
- Some properties associated to a certain class of starlike functions
- Asymptotic properties of noncanonical third order differential equations
- Existence and regularity results for unilateral problems with degenerate coercivity
- Direct and inverse approximation theorems of functions in the Orlicz type spaces 𝓢M
- Some approximation properties of a kind of (p, q)-Phillips operators
- Best proximity points for a new type of set-valued mappings
- Weakly demicompact linear operators and axiomatic measures of weak noncompactness
- Fixed point results for F𝓡-generalized contractive mappings in partial metric spaces
- Einstein-Weyl structures on trans-Sasakian manifolds
- Characterizations of linear Weingarten space-like hypersurface in a locally symmetric Lorentz space
- ∗-Ricci solitons and gradient almost ∗-Ricci solitons on Kenmotsu manifolds
- Uncorrelatedness sets of discrete random variables via Vandermonde-type determinants
- A note on the consistency of wavelet estimators in nonparametric regression model under widely orthant dependent random errors
- On adaptivity of wavelet thresholding estimators with negatively super-additive dependent noise
- Generalized Meir-Keeler type contractions and discontinuity at fixed point II