33 research outputs found

    Approximation of common fixed points in 2-Banach spaces with applications

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    [EN] The purpose of this paper is to establish the existence and uniqueness of common fixed points of a family of self-mappings satisfying generalized rational contractive condition in 2-Banach spaces. An example is included to justify our results. We approximate the common fixed point by Mann and Picard type iteration schemes. Further, an application to well-posedness of the common fixed point problem is given. The presented results generalize many known results on 2-Banach spaces.The authors thank the reviewers for valuable comments. The first author D. Ramesh Kumar would like to thank the University Grants Commission, New Delhi, India for providing the financial support in preparation of this manuscript.Kumar, DR.; Pitchaimani, M. (2019). Approximation of common fixed points in 2-Banach spaces with applications. Applied General Topology. 20(1):43-55. https://doi.org/10.4995/agt.2019.9168SWORD4355201M. Abbas, B. E. Rhoades and T. 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Zhang, Cone metric spaces and fixed point theorems of contractive mappings, J. Math. Anal. Appl. 332, no. 2 (2007), 1468-1476. https://doi.org/10.1016/j.jmaa.2005.03.087W. A. Kirk and N. Shahzad, Some fixed point results in ultrametric spaces, Topology and its Applications 159 (2012), 3327-3334. https://doi.org/10.1016/j.topol.2012.07.016K. Iseki, Fixed point theorems in 2-metric space, Math.Seminar. Notes, Kobe Univ. 3(1975), 133-136.E. Matouskova, S. Reich and A. J. Zaslavski, Genericity in nonexpansive mapping theory, Advanced Courses of Mathematical Analysis I, World Scientific Hackensack (2004), 81-98. https://doi.org/10.1142/9789812702371_0004S. B. Nadler, Sequence of contraction and fixed points, Pacific J.Math. 27 (1968), 579-585.H. K. Nashinea, M. Imdadb and M. Hasan, Common fixed point theorems under rational contractions in complex valued metric spaces, J. Nonlinear Sci. Appl. 7 (2014), 42-50. https://doi.org/10.22436/jnsa.007.01.05B. G. 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Ramesh Kumar, On Nadler type results in ultrametric spaces with application to well-posedness, Asian-European Journal of Mathematics 10, no. 4(2017), 1750073(1-15). https://doi.org/10.1142/s1793557117500735M. Pitchaimani and D. Ramesh Kumar, Generalized Nadler type results in ultrametric spaces with application to well-posedness, Afr. Mat. 28 (2017), 957-970. https://doi.org/10.1007/s13370-017-0496-6V. Popa, Well-Posedness of fixed problem in compact metric space, Bull. Univ. Petrol-Gaze, Ploicsti, sec. Mat Inform. Fiz. 60, no. 1 (2008), 1-4.D. Ramesh Kumar and M. Pitchaimani, Set-valued contraction mappings of Presic-Reichtype in ultrametric spaces, Asian-European Journal of Mathematics 10, no. 4 (2017), 1750065 (1-15). https://doi.org/10.1142/s1793557117500656D. Ramesh Kumar and M. Pitchaimani, A generalization ofset-valued Presic-Reich type contractions in ultrametric spaces with applications, J. Fixed Point Theory Appl. 19,no. 3 (2017), 1871-1887. https://doi.org/10.1007/s11784-016-0338-4D. Ramesh Kumar and M. Pitchaimani, Approximation and stability of common fixed points of Presic type mappings in ultrametric spaces, J. Fixed Point Theory Appl. 20:4(2018). https://doi.org/10.1007/s11784-018-0504-yD. Ramesh Kumar and M. Pitchaimani, New coupled fixed point theorems in cone metric spaces with applications to integral equations and Markov process, Transactions of A. Razmadze Mathematical Institute, to appear. https://doi.org/10.1016/j.trmi.2018.01.006S. Reich and A. T. Zaslawski, Well- Posedness of fixed point problems, Far East J. Math.sci, Special volume part III (2011), 393-401.W. Sintunavarat and P. Kumam, Generalized common fixed point theorems in complex valued metric spaces and applications, J. Inequal. Appl. 2012, no. 1 (2012), 1-12. https://doi.org/10.1186/1029-242x-2012-84R. J. Shahkoohi and A. 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    New coupled fixed point theorems in cone metric spaces with applications to integral equations and Markov process

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    In this paper, we define a generalized T-contraction and derive some new coupled fixed point theorems in cone metric spaces with total ordering condition. An illustrative example is provided to support our results. As an application, we utilize the results obtained to study the existence of common solution to a system of integral equations. We also present an application to Markov process. MSC: 47H10, 54H25, Keywords: T-contraction, Coupled fixed point, Sequentially convergent, Integral equations, Markov process, Cone metric spac

    Some common fixed point theorems using implicit relation in 2-Banach spaces

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    In this article, we study the existence and uniqueness of a common fixed point of family of self mappings satisfying implicit relation on a 2-Banach space. We also prove well-posedness of a common fixed point problem

    Strategies for extending operational life of the remote sensing spacecrafts encountered with power system anomalies

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    Satellite is a complex system consisting of various subsystems. These subsystems perform specific tasks such as Telecommand, Telemetry, Controlling, Data Transmission, Data Reception, Optical sensing, communicating, Powering etc. Mother of all these Systems is the Power System which has all the complexities and challenges. Keeping this in view, in this paper, an attempt has been made to study Anomalies and mitigation strategies adopted for Power Supply Systems of Indian Remote Sensing (IRS) spacecrafts. In spite of utmost care taken in the designing, testing and maintaining the Power Supply Systems and providing protection features against known sources of failures, several cases of anomalies in the power system has been observed. At times anomalies are noted in Solar Array Drive Assembly (SADA) mechanism behavior, a case of power problem due to, unfavorable Sun geometry, a case of cause due to Cell degradation and finally in a case due to string of string failures in solar panels are presented. The mitigating strategies employed are varied and depend on the nature of the anomalies and mainly aim at useful life extension of the satellites and maximizing gains from the Satellite. Cases related to satellites viz. IRS-1C, IRS-P3, IRS-P4 and TES are compiled and strategies adopted as and when the situations changed are explained. The successfully employed strategies adopted in extending the life time of the satellites is presented

    Threshold dynamics for a class of stochastic SIRS epidemic models with nonlinear incidence and Markovian switching

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    In this paper, we consider a stochastic SIRS epidemic model with nonlinear incidence and Markovian switching. By using the stochastic calculus background, we establish that the stochastic threshold â„śswt can be used to determine the compartment dynamics of the stochastic system. Some examples and numerical simulations are presented to confirm the theoretical results established in this paper

    Buckling and free vibrations behaviour through differential quadrature method for foamed composites

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    The current work focuses on predicting the buckling and free vibration frequencies (fn) of cenosphere reinforced epoxy based syntactic foam beam under varying loads. Critical buckling loads (Ncr) and fn are predicted using the differential quadrature method (DQM). Ncr and fn have been calculated for beams of varying cenosphere volume fractions subjected to axial load under clamped-clamped (CC), clamped-simply (CS), simply-simply (SS), and clamped-free (CF) boundary conditions (BC′s). Upon increasing the cenosphere volume fraction, Ncr and fn of syntactic foam composites increases. These numerical outcomes are compared with the theoretical values evaluated through the Euler-Bernoulli hypothesis and further compared with experimental outcomes. Results are observed to be in precise agreement. The results of the DQM numerical analysis are given out for the different BC′s, aspect ratios, cenosphere volume fractions, and varying loads. It is perceived that depending on the BC′s, the type of axial varying loads and aspect ratios has a substantial effect on the Ncr and fn behaviour of the syntactic foam beams. A comparative study of the obtained results showed that the beam subjected to parabolic load under CC boundary conditions exhibited a higher buckling load. © 2023 The Author
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