FIXED POINT RESULTS IN SELF MAPPING FUNCTIONS
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2 Int. J. Engg. Res. & Sci. & Tech M Ramana Reddy, 2016 Research Paper ISSN Vol. 5, No. 4, November IJERST. All Rights Reserved FIXED POINT RESULTS IN SELF MAPPING FUNCTIONS M Ramana Reddy 1 * *Corresponding Author: M Ramana Reddy mrreddyou@gmail.com The aim of this paper is to obtain some fixed point results involving occasionally weakly compatible maps in the setting of symmetric space satisfying a rational contractive condition. Our results complement, extend and unify several well known comparable results. Keywords: Fixed point, Coincidence points, Weakly compatible PRILIMINARIES Definition 2.1.1: Let S and T are self maps of a metric space X. If for some, then is called a coincidence point of S and T, and is called a point of coincidence of S and T. Definition 2.1.2: Let and are self maps of a metric space then and are said to be weakly compatible if whenever is sequence in such that for some Definition 2.1.3: Let S and T are self maps of a metric space X, then S and T are said to be weakly compatible if they commute at their coincidence points; i.e., if for some then. Definition 2.1.4: Let be the set of real functions satisfying the following conditions: is non increasing in variables. There is an such that and if satisfying a. or Then we have. And if satisfy b. or Then we have. If is such that Then. 1 Ph.D., PE, Missouri University of Science and Technology, Rolla, MO. 2 Burns & McDonnell, Kansas City, MO. 47
3 Int. J. Engg. Res. & Sci. & Tech M Ramana Reddy, 2016 MAIN RESULT Let be continuous self mappings defined on the complete metric space X into itself satisfies the following conditions: is complete subspace of X. 3. The pair and are weakly compatible. 4. For all and for non negative such that then have unique common fixed point in X. Proof: For any arbitrary in we define the sequence in such that Let us denote, since which gives for all n = 0, 1, 2, On taking Similarly we can show that and that From we have Processing the same way we can write, for any integer m we have 48
4 Int. J. Engg. Res. & Sci. & Tech M Ramana Reddy, 2016 as gives that Thus is a Cauchy sequence in X. Since is complete subspace of X then the subsequence is Cauchy sequence in T(x) which converges to the some point say u in X. Let then. Since is converges to u and hence also converges to same point u. which contradiction implies that, this means. since so by weak compatibility of it follows that, so we get we set in (iv) Since so by weak compatibility of it follows that so we get. Thus from we have which contradiction implies that B also implies that. Let then w setting we get which contradiction implies that. Similarly we can show by using. Therefore Hence the point is common fixed point of 49
5 Int. J. Engg. Res. & Sci. & Tech M Ramana Reddy, 2016 If we assume that is complete then the argument analogue to the previous completeness argument proves the theorem. If is complete then similarly if is complete then This complete prove of the theorem. Uniqueness: Let us assume that z is another fixed point of in X different from u then which contradiction the hypothesis. Hence u is unique common fixed point of in X. REFERENCES 1. Banach S (1922), Surles Operation Dansles Ensembles Abstraites Etleur Application Integrals, Fund. Math., Vol. 3, pp Chatterjee S K (1972), Fixed Point Theorems, Comptes. Rend. Acad, Bulgaria Sci., Vol. 25, pp Fisher B (1978), Common Fixed Points and Constant Mappings Satisfying a Rational Inequality, Mathematics Seminar Notes, Vol. 6, pp Jaggi D S (1977), Some Unique Fixed Point Theorems, Indian Journal of Pure and Applied Mathematics, Vol. 8, pp Jungck G (1976), Commuting Mappings and Fixed Points, Amer. Math. Monthly, Vol. 83, pp Jungck G, Murthy P P and Cho Y J (1993), Compatible Mappings of Type (A) and Common Fixed Points, Math. Japonica, Vol. 38, pp Kannan R (1968), Some Results on Fixed Point theorems, I Bull. Cat. Math. Soc., Vol. 60, pp Sessa S (1982), On a Weak Commutability Condition in Fixed Point Considerations, Publ.Inst. Math. (Beograd), Vol. 32, No. 46, pp
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