Intuitionistic Fuzzy Soft Matrix Theory
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1 Mathematics and Statistics 1(2): DOI: /ms Intuitionistic Fuzzy Soft Matrix Theory Md.Jalilul Islam Mondal * Tapan Kumar Roy Department of Mathematics Bengal Engineering and Science UniversityShibpur Howrah West Bengal India *Corresponding Author: ji.mondal@gmail.com Copyright 2013 Horizon Research Publishing All rights reserved. Abstract The purpose of this paper is to put forward the notion of intuitionistic fuzzy soft matrix theory and some basic results. In this paper we define intuitionistic fuzzy soft matrices and have introduced some new operators with weights some properties and their proofs and examples which make theoretical studies in intuitionistic fuzzy soft matrix theory more functional. Moreover we have given one example on weighted arithmetic mean for decision making problem. Keywords Soft Sets Fuzzy Soft Matrices Intuitionistic Fuzzy Soft Matrices 1. Introduction Most of our traditional tools for formal modeling reasoning and computing are crisp deterministic and precise in character. However in real life there are many complicated problems in engineering economics environment social sciences medical sciences etc. that involve data which are not all always crisp precise and deterministic in character because of various uncertainties typical problems. Such uncertainties are being dealing with the help of the theories like theory of probability theory of fuzzy sets theory of intuitionistic fuzzy sets theory of interval mathematics and theory of rough sets etc. Molodtsov [1] also described the concept of Soft Set Theory having parameterization tools for dealing with uncertainties. Researchers on soft set theory have received much attention in recent years. Maji and Roy [3] first introduced soft set into decision making problems. Maji et al.[6] introduced the concept of fuzzy soft sets by combining soft sets and fuzzy sets. Cagman and Enginoglu [4] defined soft matrices which were a matrix representation of the soft sets and constructed a soft max-min decision making method. Borah et al.[8] extended fuzzy soft matrix theory and its application. Deli and Cagmam[9] introduced intuitionistic fuzzy parameterized soft sets. They have also applied to the problems that contain uncertainties based on intuitionistic fuzzy parameterized soft sets. Babitha and John[11] described generalized intuitionistic fuzzy soft sets and solved multi criteria decision making problem in generalized intuitionistic fuzzy soft sets. Rajarajeswari and Dhanalakshmi[10] described intuitionistic fuzzy soft matrix with some traditional operations. In this paper we have introduced some operators on intuitionistic fuzzy soft matrix on the basis of weights. We have also discussed their properties. Finally we have given an elementary application on decision making problem on the basis of weighted arithmetic mean. 2. Definition and Preliminaries 2.1. Soft Set [1] Let U be an initial universe P(U) be the power set of U E be the set of all parameters and A E. A soft set (ff AA E) on the universe U is defined by the set of order pairs (ff AA E) = {(e ff AA (e)) : e E ff AA (e) P(U) } where ff AA : E P(U) such that ff AA (e) = φφ if e A. Here ff AA is called an approximate function of the soft set (ff AA E). The set ff AA (e) is called e-approximate value set or e-approximate set which consists of related objects of the parameter e E. Example 1 let U = { uu 1 uu 2 uu 3 uu 4 } be a set of four shirts and E = { white( ee 1 ) red (ee 2 ) blue (ee 3 ) } be a set of parameters. If A ={ee 1 ee 2 } E. Let ff AA (ee 1 )= { uu 1 uu 2 uu 3 uu 4 } and ff AA (ee 2 )= { uu 1 uu 2 uu 3 } then we write the soft set (ff AA E)= {(ee 1 { uu 1 uu 2 uu 3 uu 4 }) (ee 2 { uu 1 uu 2 uu 3 })} over U which describe the colour of the shirts which Mr. X is going to buy. We may represent the soft set in the following form: U white( ee 1 ) red (ee 2 ) blue (ee 3 ) uu uu uu uu Fuzzy set [6] Let U be an initial universe E be the set of all parameters
2 44 Intuitionistic Fuzzy Soft Matrix Theory and A E. A pair ( F A ) is called a fuzzy set over U where F : A PP (U) is a mapping from A into PP (U) where PP (U) denotes the collection of all subsets of U. Example 2. Consider the example 1 here we can not express with only two real numbers 0 and 1 we can characterized it by a membership function instead of crisp number 0 and 1 which associate with each element a real number in the interval [01]. (ff AA E) = { ff AA (ee 1 ) = { ( uu 1.7) (uu 2.5) (uu 3.4) (uu 4.2) } ff AA (ee 2 ) = { (uu 1.5) (uu 2.1) (uu 3.5)} } is the fuzzy soft set representing the colour of the shirts which Mr. X is going to buy. We may represent the fuzzy soft set in the following form : U white( ee 1 ) red (ee 2 ) blue (ee 3 ) uu uu uu uu Fuzzy Soft Matrices (FSM) [5] Let (ff AA E) be fuzzy soft set over U. a subset of U x E is uniquely defined by RR AA = { ( u e) : e A u ff AA (e) } which is called relation form of (ff AA E). The characteristic function of RR AA is written by µ RRAA : U x E [ 0 1] where µ RRAA (u e ) [ 01] is the membership value of u U for each e U. If µ = µ RRAA (uu ii ee jj ) we can define a matrix µ 11 µ 12 µ 1nn µ 21 µ 22 µ 2nn [µ ] mmmmmm = µ mm1 µ mm 2 µ mmmm which is called an m x n soft matrix of the soft set (ff AA E) over U. Therefore we can say that a fuzzy soft set (ff AA E) is uniquely characterized by the matrix [µ ] mmmmmm and both concepts are interchangeable. Example 3. Assume that U = { uu 1 uu 2 uu 3 uu 4 uu 5 uu 6 } is a universal set and E = { ee 1 ee 2 ee 3 ee 4 } is a set of all parameters. If A E = { ee 1 ee 2 ee 3 } and ff AA (ee 1 )= { (uu 1.3) (uu 2.4) (uu 3.6) (uu 4.1)( uu 5.6) (uu 6.5 } ff AA (ee 2 )= { (uu 1.2) (uu 2.5) (uu 3.7) (uu 4.3) ( uu 5.7) (uu 6.1)} ff AA (ee 3 )= { (uu 1.5) (uu 2.2) (uu 3.5) (uu 4.6)( uu 5.7) (uu 6.3) } the fuzzy soft set (ff AA E) is a parameterized family { ff AA (ee 1 ) ff AA (ee 2 ) ff AA (ee 3 )} of all fuzzy sets over U. Hence the fuzzy soft matrix [µ ] can be written as [µ ] = Intuitionistic Fuzzy Soft Matrix Theory 3.1. Intuitionistic Fuzzy Soft Matrix ( IFSM) [5] Let U be an initial universe E be the set of parameters and A E. Let ] Let (ff AA E) be an Intuitionistic fuzzy soft set ( IFSS) over U. a subset of U x E is uniquely defined by RR AA = { ( u e) : e A u ff AA (e) } which is called relation form of (ff AA E). The membership and non-membership functions of are written by µ RRAA : U x E [ 0 1] and νν RRAA : U x E [ 0 1] where µ RRAA : (u e ) [ 01] and νν RRAA : (u e ) [ 01] are the membership value and non membership value of u U for each e EE. If (µ ) = ( µ RRAA (uu ii ee jj ) νν RRAA (uu ii ee jj ) ) we can define a matrix [µ ] mm XX nn = (µ 11 νν 11 ) (µ 12 νν 12 ) (µ 1nn νν 1nn ) (µ 21 νν 21 ) (µ 22 νν 22 ) (µ 2nn νν 2nn ) which is (µ mm1 νν mm1 ) µ mm2 νν mm2 ) (µ mmmm νν mmmm ) called an m x n IFSM of the IFSS(ff AA E) over U. Therefore we can say that IFSS(ff AA E) is uniquely characterized by the matrix [µ ] mm XX nn and both concepts are interchangeable. The set of all m x n IFS matrices will be denoted by IFSM mm XX nn. Example 4. Let U = { uu 1 uu 2 uu 3 uu 4 uu 5 uu 6 } is a universal set and E = { ee 1 ee 2 ee 3 ee 4 } is a set of parameters. If A = { ee 1 ee 2 ee 3 } E and ff AA ( ee 1 )= { ( uu 1.3.4) ( uu 2.5.4) ( uu 3.4.5) (uu 4.6.3) ( uu 5.8.1) (uu 6.7.2) } ff AA ( ee 2 )= {( uu 1.4.5) ( uu 2.6.2)( uu 3 10) (uu 4.6.2)( uu 5.3.4)( uu 6.5.4) } ff AA ( ee 3 )= { ( uu 1.6.2)( uu 2 10) ( uu 3.9.1) (uu 4.4.2) ( uu 5.6.4) (uu 6.7.3) } the IFS set ( ff AA E) is a parameterized family { ff AA (ee 1 ) ff AA (ee 2 ) ff AA (ee 3 )} of all IFS sets over U. Hence IFSM [(µ can be written as (.3.4) (.4.5) (.6.2) (00) (.5.4) (.6.2) (10) (00) [(µ = (.4.5) (10) (.9.1) (00) (.6.3) (.6.2) (.4.2) (00) (.8.1) (.3.4) (.6.4) (00) (.7.2) (.5.4) (.7.3) (00)
3 Mathematics and Statistics 1(2): Intuitionistic Fuzzy Soft Zero Matrix [5] Let AA = [( μμ AA is called a Zero IFSM denoted by 0 = [(00 if μμ = 0 and = 0 for all i and j Intuitionistic Fuzzy Soft µ-universal Matrix An Intuitionistic fuzzy soft matrix of order m x n is said to be an Intuitionistic Fuzzy Soft µ-universal Matrix if μμ = 1 and = 0 for all i and j. It is denoted by II Intuitionistic Fuzzy Soft ν -Universal Matrix An Intuitionistic fuzzy soft matrix of order m x n is said to be an Intuitionistic Fuzzy Soft ν -Universal Matrix if μμ = 0 and =1 for all i and j. It is denoted by II Intuitionistic Fuzzy Soft Sub Matrix Let AA = [(μμ νν iijj = [(μμ AA is said to be intuitionistic fuzzy soft sub matrix of denoted by AA if μμ μμ and for all i and j Intuitionistic Fuzzy Soft Super Matrix Let AA = [(μμ = [(μμ AA is said to be intuitionistic fuzzy soft super matrix of denoted by AA if μμ μμ and for all i and j Intuitionistic Fuzzy Soft Equal Matrix Let AA = [(μμ = [(μμ AA is said to be equal denoted by AA = if μμ = μμ and = for all i and j Union of Intuitionistic Fuzzy Soft Matrices Let AA = [(μμ = [(μμ Union AA and denoted by AA is defined as AA = [max {μμ } min { } ] for all i and j Intersection of Intuitionistic Fuzzy Soft Matrices Let AA = [(μμ = [(μμ intersection AA and denoted by AA is defined as AA = [min {μμ } max{ } ] for all i and j Complement of Intuitionistic Fuzzy Soft Matrix Let AA =[(μμ Complement of AA denoted by AA 0 is defined as AA 0= [( μμ for all i and j. Proposition1. Let AA = [(μμ = [(μμ IFSM mm XX nn. De Morgan s type results are true which can be written as: a) (AA ) 0 = AA 0 0 b) (AA ) 0 = AA 0 0 Proof: a) For all i and j we have (AA ) 0 = ([(μμ [(μμ ) 0 =[max {μμ } min{ } ] 0 = [min{ } max {μμ } ] = [( [ ( = AA 0 0 The result b) can be proved in similar way. Proposition2. Let AA = [(μμ = [(μμ IF SM mm XX nn. i) (AA 0 0 ) 0 = AA ii) (AA 0 0 ) 0 = AA iii) (AA ) 0 = AA. iii) (AA 0. 0 ) 0 = AA + Proposition3. Let AA = [(μμ a) ((AA 0)) 0 = AA f) AA II = AA b) (II ) 0 = II g) AA AA = AA c) (II ) 0 = II h) AA II = AA d) AA AA = AA i) AA II = II e) AA II = II Intuitionistic Fuzzy Soft Square Matrix Let AA =[(μμ AA is said to be Intuitionistic Fuzzy Soft Square Matrix if m=n for all i and j Intuitionistic Fuzzy Soft Row Matrix Let AA =[(μμ AA is said to be Intuitionistic Fuzzy Soft Row Matrix if n=1 for all i and j Intuitionistic Fuzzy Soft Column Matrix Let AA =[( μμ IF SM mm XX nn. AA is said to be Intuitionistic Fuzzy Soft Column matrix if m=1for all i and j Intuitionistic Fuzzy Soft Diagonal Matrix Let AA =[(μμ AA is said to be intuitionistic Fuzzy Soft Diagonal Matrix if m=n and i= j Max-Min Product of Intuitionistic Fuzzy Soft Matrices Let AA = [(μμ IFSM mm XX nn = [(μμ IFSM nn XX pp. the Max-Min Product of AA and denoted by AA * is defined as AA * = [ max-min(μμ μμ ) min-max( for all i and j Scalar Multiplication of Intuitionistic Fuzzy Soft Matrix
4 46 Intuitionistic Fuzzy Soft Matrix Theory Let AA =[(μμ IFSM mm XX nn and k be a scalar. the Scalar Multiplication of Intuitionistic Fuzzy Soft Matrix AA by the scalar k denoted by k AA defined as k AA = [( k μμ k where 0 k 1 for all i and j Operators of Intuitionistic Fuzzy Soft Matrices Let AA = [(μμ = [(μμ IFSM =[(μμ is called a) the. (product) operation of AA and denoted by = AA. if μμ =μμ. μμ and = +. for all i and j. b) the + (Probabilistic sum) operation of AA and denoted by = AA + if μμ = μμ + μμ μμ. μμ and =. for all i and j. c) (Arithmetic Mean) operation of AA and denoted by = if μμ + νν = μμ AA + μμ 2 and = for all i and j. 2 d) ww ( Weighted Arithmetic Mean) operation of AA and denoted by = ww if μμ = ww 1 μμ + ww2 μμ + ww2 νν ww 1 + ww = ww 1 for all i and j. ww 2 ww 1 + ww 1 > 0 2 ww 2 > 0 e) the $ (Geometric Mean) operation of AA and denoted by = AA $ if μμ = μμ. μμ and =. for all i and j. f) the $ ww (Weighted Geometric Mean) operation of AA and denoted by = AA $ ww if μμ = 1 (( μμ ) ww 1. (μμ ) ww 2) and = 1 (( ) ww 1. ( ) ww 2 ) for all i and j. ww 1 > 0 ww 2 > 0 g) the (Harmonic Mean) operation of AA and μμ.μμ denoted by = AA if μμ = 2. and νν μμ + μμ =.νν 2. for all i and j. ww νν + νν 1 > 0 ww 2 > 0 h) the ww ( Weighted Harmonic Mean) operation of AA and denoted by = AA ww if μμ = ( = ww 1 νν + ww 2 νν for all i and j. ww 1 μμ + ww 2 μμ Example5. Let AA = [(μμ = [(μμ IFSM 3 XX 2 where (.3.2) (.4.5) (.3.4) (.6.4) AA = (.6.4) (.5.4) and = (.4.2) (.3.7). (.5.3) (.7.2) (.7.1) (.6.4) (.3.4) (.4.5) (AA 0 0 ) 0 = (.4.4) (.3.7) = AA (.5.3) (.6.4) Proposition4. Let AA = [(μμ = [(μμ IFSM mm XX nn. i) (AA ww 0 ) 0 = ww ii) (AA 0 $ ww 0 ) 0 = AA $ ww iii) (AA 0 ww 0 ) 0 = AA ww Proof: Let AA = [(μμ = [(μμ IFSM mm XX nn and ww 1 > 0 ww 2 > 0. (AA ww 0 ) 0 =( [ ww [( ) 0 = [ ( ww 1 +ww2 ww 1μμ +ww2 μμ 0 = [ ( ww 1μμ +ww2 μμ ww 1 +ww2 = ww Similar proof for others. Proposition5.( Commutative law) Let AA = [(μμ = [(μμ i) AA = AA iii) AA + = + AA ii) AA = AA iv) AA. =. AA Proof: For all i and j i) AA = [ ( max {μμ } min { } = [ ( max {μμ } min { } = AA Validity: Since 0 μμ max {μμ } 1 min { } 1. ii) AA = [ ( min {μμ } max { } = [ ( min {μμ } max { } = AA Validity : Same as (i) Validity: Same as viii) when ww 1 = ww 2 Similarly we can prove the other results and also the validity. Proposition6.( Commutative laws on the base of weight) Let AA = [(μμ = [(μμ i) ww ww AA ii) AA ww = ww AA iii) AA $ ww = $ ww AA Proof: For all i and j and ww 1 > 0 ww 2 > 0 ww = [ ( ww 1μμ +ww2 μμ = [ ( ww 2μμ +ww1 μμ ww 2 + ww 1 = ww AA ww 1 +ww2 ww 2 +ww1 ww 2 + ww 1 Similar proof for others. Proposition7.( Associative law) Let AA = [(μμ = [(μμ = [(μμ i) (AA ) = AA ( )
5 Mathematics and Statistics 1(2): ii) (AA ) = AA ( ) iii) (AA + ) + = AA + ( + ) iv) (AA. ). = AA. (. ) v) ) vi) (AA $ ) $ AA $ ( $ ) vii) (AA ) AA ( ) Proof : For all i and j i) (AA ) = [ ( max {μμ } min { } [(μμ = [ ( max {(μμ ) } min {( ) } = [ ( max {μμ ( μμ ) } min { ( ) } = AA ( ) Validity : Since 0 μμ max {μμ } 1 min { } ii) (AA ) = [ ( min {μμ } max { } [(μμ = [ ( min {(μμ ) } max {( ) } = [ ( min {μμ ( μμ ) } max { ( ) } = AA ( ) Validity : Same as (i) Similarly we can verify the other results. Proposition8. (Distributive law) Let AA = [(μμ = [(μμ and =[(μμ i) AA ( ) = (AA ) ( AA ) ii) ( AA ) = (AA ) ( ) iii) AA ( )= (AA ) ( AA ) iv) ( AA ) = (AA ) ( ) v) ( AA = ) ) vi) ( AA ) = (AA ) ( ) vii) ( AA ) + = (AA + ) ( + ) viii) ( AA ). = (AA. ) (. ) ix) AA ) = (AA ( AA ) x) ( AA ) = (AA ) ( ) xi) ( ) = ) ( ) xii) ( ) = ) ) xiii) AA $ ( ) = (AA $ ) ( AA $ ) xiv) ( AA ) $ = (AA $ ) ( $ ) xv) ) = (AA. ( AA. ) xvi) AA ( ) = (AA ) ( AA ) xvii) AA ( ) = (AA ) ( AA ) xviii) AA $ ( ) = (AA $ ) ( AA $ ) xix) ( AA ) $ =(AA $ ) ( $ ) Proof : Let AA = [(μμ = [(μμ and =[(μμ IFSM mm XX nn. i ) AA ( ) =[(μμ [ ( max{μμ } min{ } =[( min( μμ max{μμ } ) max ( min{ }) (AA ) ( AA ) = [ ( min{ μμ } max { } [ ( min{ μμ } max { } =[( max (min{ μμ } min{ μμ } ) min (max { } max { }) =[( max( μμ min{ μμ } ) min ( max { }) =[( min( μμ max{μμ } ) max ( min{ }) Hence AA ( ) = (AA ) ( AA ) iii ) AA ( ) = [(μμ [ ( min{μμ } max{ } =[( max( μμ min{μμ } ) min ( max{ }) (AA ) ( AA ) = [ ( max{ μμ } min { } ] [ ( max{ μμ μμ } min { } =[( min (max{ μμ } max{ μμ } ) max (min { } min { }) =[( min( μμ max{ μμ } ) max ( min { }) =[( max( μμ min{μμ } ) min ( max{ }) Hence AA ( )= (AA ) ( AA ). Similarly we can prove other results. Example6. Let AA = [(μμ = [(μμ = [(μμ IFSM 2 XX 2 where (.3.2) (.4.5) AA = (.5.3) (.7.2) BB (.4.3) (.6.2) = (.7.2) (.3.4) = (.6.3) (.5.3) (.6.4) (.7.2) (.3.3) (.4.5) i) AA ( ) = (.5.3) (.7.2) = (AA ) ( AA ) Proposition9.(Laws of Idempotence on the base of weight) i) ww AA = AA ii) AA ww AA = AA iii) AA $ ww AA = AA Proof: Let AA = [(μμ for all i and j and w = ww 1 = ww 2 > 0 ii) AA ww AA ww+ww ww+ww = [ ( ( ww μμ + ww μμ ww νν + ww νν = [(μμ = AA Similar proof for others.
6 48 Intuitionistic Fuzzy Soft Matrix Theory 4. Application of Weighted Arithmetic Mean (AA WWWWWW ) of Intuitionistic Fuzzy Soft Matrix in Decision Making In this section we define arithmetic mean and weighted arithmetic mean of intuitionistic fuzzy soft matrix Weighted Arithmetic Mean of Intuitionistic Fuzzy Soft Matrix (AA WWWWWW ) Let AA = [(μμ Weighted Arithmetic Mean of Intuitionistic Fuzzy Soft Matrix AA denoted by AA WWWWWW is defined as AA WWWWWW =[ ( nn ww jj =1 jj μμ nn jj =1 ww jj nn jj =1 ww jj nn jj =1 ww jj ww jj for j = 1 2. n are respective weights for membership and non-membership value. Note:. Arithmetic Mean (A.M.) of Intuitionistic Fuzzy Soft Matrix : Let AA = [(μμ Arithmetic Mean of Intuitionistic Fuzzy Soft Matrix AA of membership and non-membership value denoted by AA AAAA is defined as AA AAAA = [ ( nn μμ AA jj =1 nn nn AA jj =1 nn when weights are equal. Input : Intuitionistic fuzzy soft sets with m objects each of which has n parameters. Output : An optimum result. Algorithm: Step- 1: Choose the set of parameters. Step -2: Construct the intuitionistic fuzzy soft matrix for the set of parameters. Step- 3: Compute the weighted arithmetic mean of membership and non-membership value of intuitionistic fuzzy soft matrix as AA WWWWWW. Step-4: Choose the object with highest membership value. In case of tie i.e. when more than one object with same highest membership value choose the object with highest membership value as well as lowest non- membership value. Example 7. Suppose a company A produces five different types of cars cc 1 cc 2 cc 3 cc 4 cc 5 such that U = { cc 1 cc 2 cc 3 cc 4 cc 5 } and E = { ee 1 (comfort) ee 2 ( good mileage ) ee 3 ( good power steering ) } be a set of parameters. Suppose Mr. X is going to buy a car and an intuitionistic fuzzy soft matrix is constructed on the basis of the parameters as follows : A = A AAAA = (.5.4) (.6.2) (.5.2) (.9.1) (.5.1) (.4.3) (.6.2) (.5.4) (.7.2) (.6.2) (.8.2) (.6.4) (.4.3) (.6.2) (.5.1) ( ) (.6.167) (.6.267) (1) ( ) (.5.2) If we prefer to comfort of the cars and weights are given on the parameters comfort good mileage good power steering respectively then (.51.36) (.81.12) A WWWWWW = (.6.22).(2) (.62.22) (.43.27) From the above results (1) and (2) it is clear that if we give equal preference we have.667 is the highest membership value of (1). So cc 4 car is most suitable for Mr. X. But if we give more preference on comfort than other parameters(good mileage good power steering) then cc 2 car is the most suitable for Mr. X. 5. Conclusion In this paper we have introduced some new operators on the base of weights (weighted A.M weighted G.M weighted H.M ) and properties on intuitionistic fuzzy soft matrix. Some of the associative laws and distributive properties have been proved and verified with examples. Some of the commutative laws and idempotent laws on the base of weight have been proved. Lastly we have given one elementary application for decision making problem on the basis weighted arithmetic mean. This method can be applied on other decision making problem with uncertain parameters. REFERENCES [1] D. Molodtsov Soft set theory first result Computers and Mathematics with Applications 37(1999) [2] P. K. Maji R. Biswas and A. R. Roy Soft Set Theory Computer and Mathematics with Applications 45(2003) [3] P. K. Maji R. Biswas and A. R. Roy An application of soft sets in a decision making problems Computer and Mathematics with Applications 44(2002) [4] Naim Cagman and Serdar Enginoglu Soft matrix theory and its decision making Computers and Mathematics with Applications 59(2010) [5] B. Chetia and P.K. Das Some results of intuitionistic fuzzy soft matrix theory Advances in Applied Science Research (2012)3(1) [6] P. K. Maji R. Biswas and A. R. Roy Fuzzy Soft Sets Journal of Fuzzy Mathematics Vol 9 no.3 ( 2001) pp [7] N. Cagman and S. Enginoglu Fuzzy soft matrix theory and its application in decision making International Journal of Fuzzy Systems vol.9 (2012) pp [8] Manas Jyoti Borah Tridiv Jyoti Neog Dusmanta Kumar Sut
7 Mathematics and Statistics 1(2): Fuzzy soft matrix theory and its decision making IJMER vol.2 issue2 March-Apr (2012) pp [9] Irfan Deli Naim Cagman Intuitionistic fuzzy parameterized soft set theory and its decision making_ v1[ math.lo] 3 Jan [10] P.Rajarajeswari P.Dhanalakshmi Intuitionistic fuzzy soft matrix theory and its application in decision making International Journal of Engineering Research & Technology vol. 2 issue 4 April [11] Babitha K.V. and Sunil Jacob John Generalized Intuitionistic fuzzy soft sets and its applicationsgen.math.notesvol.7no.2.december2011pp. 1-14
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