This document presents a theorem that establishes the existence of a unique common fixed point for two weakly compatible self-maps S and T on a complete metric space under a new integral type contractive condition. The theorem proves that if conditions (i) and (ii) are satisfied, where condition (ii) involves integral inequalities, then S and T have a unique common fixed point. The proof involves showing that a sequence defined using S and T is Cauchy, which guarantees convergence in the complete metric space. This convergence leads to a contradiction unless the maps have a common fixed point.
Fixed Point Theorem in Fuzzy Metric SpaceIJERA Editor
In this present paper on fixed point theorems in fuzzy metric space . we extended to Fuzzy Metric space
generalisation of main theorem .
Mathematics Subject Classification: 47H10, 54A40
Semicompatibility and fixed point theorem in fuzzy metric space using implici...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Fixed Point Theorem in Fuzzy Metric SpaceIJERA Editor
In this present paper on fixed point theorems in fuzzy metric space . we extended to Fuzzy Metric space
generalisation of main theorem .
Mathematics Subject Classification: 47H10, 54A40
Semicompatibility and fixed point theorem in fuzzy metric space using implici...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
8 fixed point theorem in complete fuzzy metric space 8 megha shrivastavaBIOLOGICAL FORUM
ABSTRACT: In this paper our works establish a new fixed point theorem for a different type of mapping in complete fuzzy metric space. Here we define a mapping by using some proved results and obtain a result on the actuality of fixed points. We inspired by the concept of Hossein Piri and Poom Kumam [15]. They introduced the fixed point theorem for generalized F-suzuki -contraction mappings in complete b-metric space. Next Robert plebaniak [16] express his idea by result “New generalized fuzzy metric space and fixed point theorem in fuzzy metric space”. This paper also induces comparing of the outcome with existing result in the literature.
Keywords: Fuzzy set, Fuzzy metric space, Cauchy sequence Non- decreasing sequence, Fixed point, Mapping.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Fixed Point Theorem in Fuzzy Metric Space Using (CLRg) Propertyinventionjournals
The object of this paper is to establish a common fixed point theorem for semi-compatible pair of self maps by using CLRg Property in fuzzy metric space.
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International Journal of Mathematics and Statistics Invention (IJMSI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJMSI publishes research articles and reviews within the whole field Mathematics and Statistics, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
8 fixed point theorem in complete fuzzy metric space 8 megha shrivastavaBIOLOGICAL FORUM
ABSTRACT: In this paper our works establish a new fixed point theorem for a different type of mapping in complete fuzzy metric space. Here we define a mapping by using some proved results and obtain a result on the actuality of fixed points. We inspired by the concept of Hossein Piri and Poom Kumam [15]. They introduced the fixed point theorem for generalized F-suzuki -contraction mappings in complete b-metric space. Next Robert plebaniak [16] express his idea by result “New generalized fuzzy metric space and fixed point theorem in fuzzy metric space”. This paper also induces comparing of the outcome with existing result in the literature.
Keywords: Fuzzy set, Fuzzy metric space, Cauchy sequence Non- decreasing sequence, Fixed point, Mapping.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Fixed Point Theorem in Fuzzy Metric Space Using (CLRg) Propertyinventionjournals
The object of this paper is to establish a common fixed point theorem for semi-compatible pair of self maps by using CLRg Property in fuzzy metric space.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Existence of Solutions of Fractional Neutral Integrodifferential Equations wi...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
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International Journal of Mathematics and Statistics Invention (IJMSI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJMSI publishes research articles and reviews within the whole field Mathematics and Statistics, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
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A common fixed point theorem for two weakly compatible mappings satisfying a new contractive condition of integral type
1. Mathematical Theory and Modeling www.iiste.org
ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online)
Vol.1, No.1, 2011
A Common Fixed Point Theorem for Two Weakly Compatible
Mappings Satisfying a New Contractive Condition of Integral
Type
Vishal Gupta1*, Naveen Mani2
1. Department Of Mathematics, Maharishi Markandeshwar University, Mullana,
Ambala, Haryana, (India)
2. Department Of Mathematics, Maharishi Markandeshwar University, Mullana,
Ambala, Haryana, (India)
* E-mail of the corresponding author: vishal.gmn@gmail.com,
vkgupta09@rediffmail.com
Abstract
In this paper we study a unique common fixed point theorem. The existence of fixed
point for two weakly compatible maps is established under new contractive condition of
integral type by using another functions and .
Keywords: Fixed point, Complete metric space, Weakly Compatible maps.
1. Introduction
The concept of commutativity has been used and generalized by many authors in several
ways. For this Jungck (1976) proved a common fixed point theorem for commuting maps
generalizing the Banach’s fixed point theorem. On the other hand Sessa (1982) has
introduced the concept of weakly commuting .It is further generalized by Jungck (1988),
so called compatibility. It can be easily verified that when two mappings are commuting
then they are compatible. Clearly commuting, weakly commuting mappings are
compatible but conversely need not be true.
The study of fixed point theorems satisfying various types of contractive inequalities has
been a very active field of research during the last few decades. Such condition involves
rational, irrational and general type expressions. To study more about this matter we
recommended going deep into the survey articles by Rhodes (1977), (1983).
In (2002) Branciari obtained a fixed point result for a single mapping satisfying an
analogue of a Banach contraction principle for integral type inequality as below:
Theorem 1.1(Branciari 2002) Let (X, d) be a complete metric space, [ )
a mapping such that for each
( ) ( )
∫ ( ) ≤ ∫ ( )
Where [ ) [ ) is a “Lebesgue-integrable function” which is summable on
each compact subset of , non-negative, and such that for each , ∫ ( )
then has a unique fixed point such that for each
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2. Mathematical Theory and Modeling www.iiste.org
ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online)
Vol.1, No.1, 2011
After this result, there are many theorems dealing with mappings satisfying a general
contractive condition of integral type.
Vishal Gupta et al. (2008) prove a common fixed point theorem for R-weakly commuting
fuzzy maps satisfying a general contractive condition of integral type. Recently Vishal
Gupta (2008) proves a Common Fixed Point Theorem for Compatible Mapping.
Some other is noted in (Abbas et al. 2007; Altun 2007; Branciari 2002; Rhoades 1987;
Rhoades 2007; Kumar S et al. 2007; Vijayaraju et al. 2005)
2. Preliminaries
We recall the definitions of complete metric space and other results that will be needed in
the sequel.
( )
( )
( )
( )
( )
3. Main Result
Theorem3.1. Let S and T be self compatible maps of a complete metric space (X, d)
satisfying the following conditions
(i) S(X) T(X) (3.1)
( ) ( ) ( )
(ii) ∫ ( ) ≤ ∫ ( ) - ∫ ( ) (3.2)
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3. Mathematical Theory and Modeling www.iiste.org
ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online)
Vol.1, No.1, 2011
for each x,y X where [ ) [ ) is a continuous and non decreasing
function and [ ) [ ) is a lower semi continuous and non decreasing
function such that ( ) = ( ) = 0 if and only if also [ ) [ ) is
a “Lebesgue-integrable function” which is summable on each compact subset of , non-
negative, and such that for each , ∫ ( )
Then S and T have a unique common fixed point.
Proof : Let be an arbitrary point of X. Since S(X) T(X).Choose a point in X such
that S =T . Continuing this process, in general, choose such
that
For each integer from (3.2)
( ) ( ) ( )
∫ ( ) ∫ ( ) - ∫ ( ) (3.3)
( )
∫ ( )
Since is continuous and has a monotone property, Therefore
( ) ( )
∫ ( ) ∫ ( )
( )
Let us take =∫ ( ) then it follows that is monotone decreasing and
lower bounded sequence of numbers. Therefore there exist such that
as . Suppose that
Taking limit as on both sides of (3.3) and using that is lower semi
continuous, we get,
( ) ( ) ( ) ( )
This is a contradiction. Therefore = 0. This implies
as
( )
∫ ( ) as (3.5)
Now we prove that is a Cauchy sequence. Suppose it is not. Therefore there exist an
and subsequence { ( ) } & { ( ) } such that for each positive integer , ( )is
minimal in the sense that
( ( ) ( )) ( ( ) ( ))
(3.6)
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Vol.1, No.1, 2011
Now,
( ( ) ( )) ( ( ) ( ) ) ( ( ) ( ))
( ( ) ( ) )
(3.7)
Now
( ( ) ( )) ( ( ) ( ) )
∫ ( ) ∫ ( ) ∫ ( )
Letting and from (3.5)
( ( ) ( ))
∫ ( ) (3.8)
Now consider the triangle inequality,
( ( ) ( )) ( ( ) ( ) ) ( ( ) ( ) ) ( ( ) ( ))
( ( ) ( ) ) ( ( ) ( )) ( ( ) ( )) ( ( ) ( ) )
and therefore,
( ( ) ( )) ( ( ) ( ) ) ( ( ) ( ) ) ( ( ) ( ))
∫ ( ) ∫ ( )
( ( ) ( ) ) ( ( ) ( )) ( ( ) ( )) ( ( ) ( ) )
∫ ( ) ∫ ( )
Taking and using (3.5) and (3.8) in above inequalities, we get
( ( ) ( ) ) ( ( ) ( ) )
∫ ( ) ∫ ( )
This implies,
( ( ) ( ) )
∫ ( ) (3.9)
Now from (3.2), we have
( ( ) ( )) ( ( ) ( ) )
∫ ( ) ≤ ∫ ( ) -
( ( ) ( ) )
∫ ( )
Taking limit as and using (3.8) and (3.9), we get
( )≤ ( )- ( )
This is a contradiction. Hence is a Cauchy sequence. Since (X, d) is complete
metric space, therefore there exist a point such that
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ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online)
Vol.1, No.1, 2011
Consequently, we can find in X such that ( ) .
Now,
( ) ( ) ( )
∫ ( ) ≤ ∫ ( ) - ∫ ( )
On taking limit as implies
( )
(∫ ( ) )≤ ( )- ( )
( )
And so (∫ ( ) ) implies that ( ) . Hence is the point of
coincidence of and .
Now we prove that is the unique point of coincidence of and . Suppose not,
therefore there exist ( ) and there exist α in X such that (α) (α) .
Using (3.2) we have
( α) ( α) ( α)
∫ ( ) ∫ ( ) ≤ ∫ ( ) -
( α) ( α) ( α)
∫ ( ) ∫ ( ) ∫ ( )
This is a contradiction which implies . This proves uniqueness of point of
coincidence of and . Therefore by using lemma (2.4), the result is proved.
References
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of occasionally weakly compatible mappings satisfying generalized contractive
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6. Mathematical Theory and Modeling www.iiste.org
ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online)
Vol.1, No.1, 2011
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