DETERMINANT AND ADJOINT OF FUZZY NEUTROSOPHIC SOFT MATRICES
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1 DETERMINANT AND ADJOINT OF FUZZY NEUTROSOPHIC SOFT MATRICES R.Uma, P. Murugadas and S.Sriram * Department of Mathematics, Annamalai University, Annamalainagar , India. Department of Mathematics, Mathematics wing, D.D.E, Annamalai University, Annamalainagar , India. Abstract In this paper, we have introduced the determinant and adjoint of a square Fuzzy Neutrosophic Soft Matrices (FNSMs). Also we define the circular FNSM and study some relations on square FNSM such as reflexivity, transitivity and circularity. Keywords: Fuzzy Neutrosophic Soft Set, Fuzzy Neutrosophic Soft Matrix, Determinant of a square FNSM, Adjoint of a square FNSM. 1 Introduction The theory of fuzzy set was introduced by Zadeh? as an appropriate mathematical instrument for description of uncertainty observed in nature. Since the inception it has got intensive acceptability in various fields. The traditional fuzzy sets is characterised by the membership value or the grade of membership value. Some times it may be very difficult to assign the membership value for fuzzy sets. Consequently the concept of interval valued fuzzy sets was proposed? to capture the uncertainty of grade of membership value. In some real life problems in expert system, belief uma83bala@gmail.com bodi muruga@yahoo.com ssm 3096@yahoo.co.in 1
2 system, information fusion and so on, we must consider the truth membership as well as the falsity-membership for proper description of an object in uncertain, ambiguous environment. Neither the fuzzy sets nor the interval valued fuzzy sets is appropriate for such a situation. Intuitionistic fuzzy sets introduced by Atanassov? is appropriate for such a situation. The intuitionistic fuzzy sets can only handle the incomplete information considering both the truth membership (or simply membership) and falsity-membership (or non membership) values. It does not handle the indeterminate and inconsistent information which exists in belief system. Smarandache? introduced the concept of neutrosophic set which is a Mathematical tool for handling problems involving imprecise, indeterminacy and inconsistent data. The concept of soft set theory was introduced by Molodtsov? in 1999, it is a new approach for modeling vagueness and uncertainty. Soft set theory has a rich potential for applications in several directions, few of which had been shown by Molodtsov in his pioneer work. It is well known that the matrix formulation of a Mathematical formula gives extra advantages to handle the problem. The classical matrix theory cannot solve the problems involving various types of uncertainities. That type of problems are solved by using fuzzy matrix?. Fuzzy matrix has been proposed to represent fuzzy relation in a system based on fuzzy set theory, Ovehinnikov?. Fuzzy matrices play an important role in Science and Technology. Kim?,?,? has explored some important result on the determinant of a square matrix. In Yong Yang and Chenli Ji?, introduced a matrix representation of soft set and applied it in decision making problems. Rajarajeswari and Dhanalakshmi? introduced fuzzy soft matrix and its application in Medical diagnosis. Sumathi and Arockiarani? introduced new operations on fuzzy neutrosophic soft matrices. Mamouni Dhar? et al., have also defined Neutrosophic fuzzy matrices and studied about square neutrosophic fuzzy matrices. In this article our main intention is to define determinant and adjoint of FNSMs. Furthermore, efforts have been made to establish some properties with the help of the new introduced definition of determinant of square FNSMs. In section 1 we have introduced determinant of two types FNSM and its properties. In section 2, the definition of adjoint of FNSM is given and some related Theorems are asserted. 2 preliminaries Definition 2.1.? Let U be an initial universe set and E be a set of parameters. Let P(U) denotes the power set of U. Consider a nonempty set A, A E. A pair (F,A) is called a soft set over U, where F is a mapping given by F : A P (U). 2
3 Definition 2.2.? Let U be an initial universe set and E be a set of parameters. Consider a non empty set A, A E. Let P (U) denotes the set of all fuzzy neutrosophic sets of U. The collection (F, A) is termed to be the Fuzzy Neutrosophic Soft Set (FNSS) over U, Where F is a mapping given by F : A P (U). Hereafter we simply consider A as FNSM over U instead of (F, A). Definition 2.3.? A neutrosophic set A on the universe of discourse X is defined as A { x, T A (x), I A (x), F A (x), x X}, where T, I, F : X 0, 1 + and 0 T A (x) + I A (x) + F A (x) (1) From philosophical point of view the neutrosophic set takes the value from real standard or non-standard subsets of 0, 1 +. But in real life application especially in scientific and Engineering problems it is difficult to use neutrosophic set with value from real standard or non-standard subset of 0, 1 +. Hence we consider the neutrosophic set which takes the value from the subset of 0, 1. Therefore we can rewrite the equation (1) as 0 T A (x) + I A (x) + F A (x) 3. In short an element a in the neutrosophic set A, can be written as a a T, a I, a F, where a T denotes degree of truth, a I denotes degree of indeterminacy, a F denotes degree of falsity such that 0 a T + a I + a F 3. Example 2.4. Assume that the universe of discourse X {x 1, x 2, x 3 }, where x 1, x 2, and x 3 characterises the quality, relaibility, and the price of the objects. It may be further assumed that the values of {x 1, x 2, x 3 } are in 0, 1 and they are obtained from some investigations of some experts. The experts may impose their opinion in three components viz; the degree of goodness, the degree of indeterminacy and the degree of poorness to explain the characteristics of the objects. Suppose A is a Neutrosophic Set (NS) of X, such that A { x 1, 0.4, 0.5, 0.3, x 2, 0.7, 0.2, 0.4, x 3, 0.8, 0.3, 0.4 }, where for x 1 the degree of goodness of quality is 0.4, degree of indeterminacy of quality is 0.5 and degree of falsity of quality is 0.3 etc,. Let F m n denotes FNSM of order m n and F n denotes FNSM of order n n. Operations on FNSM of type-i are defined as follows. Definition 2.5.? Let A ( a T ij, a I ij, a F ij ), B ( b T ij, b I ij, b F ij ) Fm n. The componentwise addition and componentwise multiplication is defined as A B (sup { a T ij, b T ij}, sup { a I ij, b I ij}, inf { a F ij, b F ij} ). A B (inf{a T ij, b T ij}, inf{a I ij, b I ij}, sup{a F ij, b F ij}). Definition 2.6.? Let A F m n, B F n p, the composition of A and B is defined as 3
4 ( n A B (a T ik b T kj), n (a I ik b I kj), ) n (a F ik b F kj) equivalently we can write the same as ( n ) n n (a T ik b T kj), (a I ik b I kj), (a F ik b F kj). The product A B is defined if and only if the number of columns of A is same as the number of rows of B. A and B are said to be conformable for multiplication. We shall use AB instead of A B. Definition 2.7.? Let A ( a T ij, a I ij, a F ij ) and c F 0, 1. Define the fuzzy neutrosophic scalar multiplication as ca ( inf{c, a T ij}, inf{c, a I ij}, sup{c, a F ij} ) F m n. For the universal matrix J 1, by the definition 2.5, cj 1 inf(c 1, 1, 0 ) ( inf{c, 1}, inf{c, 1}, sup{c, 0} ) ( c, c, c ) is the constant matrix all of whose entries are c. Further under componentwise multiplication cj 1 A ( c, c, c ) ( a T ij, a I ij, a F ij ) ( min{c, a T ij}, min{c, a I ij}, max{c, a F ij} ) ca...(2) Definition 2.8. If A (a ij ) F m n, where (a ij ) ( a T ij, a I ij, a F ij ), then A c (b ij ) m n where (b ij ) ( a F ij, 1 a I ij, a T ij ), is the complement of A. Definition 2.9.? The n m Zero matrix O 1 is the matrix all of whose entries are of the form 0, 0, 1. { 1, 1, 0 if i j The n n identity matrix I 1 is the matrix I 1 0, 0, 1 if i j The n m universal matrix J 1 is the matrix all of whose entries are of the form 1, 1, 0. Operations on FNSM of type-ii are defined as follows. Definition 2.10.? Let A (a T ij, a I ij, a F ij), B (b T ij, b I ij, b F ij) F m n, the componentwise addition and componentwise multiplication is defined as A B ( sup { a T ij, b T ij}, inf { a I ij, b I ij}, inf { a F ij, b F ij} ). A B ( inf{a T ij, b T ij}, sup{a I ij, b I ij}, sup{a F ij, b F ij} ). Analogous to FNSM of type-i we can define FNSM of type -II in the following way 4
5 Definition 2.11.? Let A ( a T ij, a I ij, a F ij ) (a ij ) F m n and B ( b T ij, b I ij, b F ij ) (b ij ) F n p the product of A and B is defined as ( n n n A B a T ik bkj T, a I ik bkj ) I, a F ik b F kj equivalently we can write the same as ( n n n a T ik bkj T, a I ik bkj ) I, a F ik b F kj. the product A B is defined if and only if the number of columns of A is same as the number of rows of B. A and B are said to be conformable for multiplication. Definition 2.12.? The n m Zero matrix O 2 is the matrix all { of whose entries are 1, 0, 0 if i j of the form 0, 1, 1. The n n identity matrix I 2 is the matrix 0, 1, 1 if i j The n m universal matrix J 2 is the matrix all of whose entries are of the form 1, 0, 0. Definition 2.13.? Let A ( a T ij, a I ij, a F ij ) and c F, then the fuzzy neutrosophic scalar multiplication is defined by ca (inf{c, a T ij}, sup{c, a I ij}, sup{c, a F ij}) Proposition 2.14.? If A B, then AC BC. 3 The determinant and adjoint of FNSM of type-i Definition 3.1. The determinant A of n n FNSM A ( a T ij, a I ij.a F ij ) is defined as follows A a T 1σ(1)... at nσ(n), a I 1σ(1)... ai nσ(n), a F 1σ(1)... af nσ(n) σ S n σ S n σ S n where S n denotes the symmetric group of all permutations of the indices (1, 2,...n). Example 3.2. Let A ( a T ij, a I ij, a F ij ) be a FNSM such that (0.5, 0.3, 0.4) (0.6, 0.7, 0.8) A (0.9, 0.6, 0.7) (0.5, 0.6, 0.7) 5
6 A ( 0.5, 0.3, , 0.6, 0.7 ) ( 0.6, 0.7, , 0.6, 0.7 ) 0.5, 0.3, , 0.6, , 0.6, 0.7 Theorem 3.3. If a FNSM B is obtained from an n n FNSM A ( a T ij, a I ij, a F ij ) by multiplying the i th row of A (i th column) by k 0, 1, then B k A. Proof. Suppose that B ( b T ij, b I ij, b F ij ), then B b T 1σ(1)... bt nσ(n), b I 1σ(1)... bi nσ(n), b F 1σ(1)... bf nσ(n) σ S n σ S n σ S n a T 1σ(1)... k a iσ(i)... a T nσ(n), a I 1σ(1)... k ai iσ(i)......ai nσ(n), a F 1σ(1) σ S n σ S n σ S n... k a F iσ(i)...af nσ(n) k a T 1σ(1)... at nσ(n), k a I 1σ(1)... ai nσ(n), k σ S n a F 1σ(1)... af nσ(n) ) σ S n σ s n k a T ij, a I ij, a F ij k A. Theorem 3.4. Let A ( a T ij, a I ij, a F ij ) be an n n FNSM then det(p A) det(a) det(ap ), where P is a permutation FNSM which is obtained from the identity FNSM by interchanging row i and row j. Proof. Let A ( c T ij, c I ij, c F ij ). Then for any i, j, the i th(j th) row of P A is the j th(i th respectively) row of A. Infact, P is a permutation FNSM which is generated by a permutation i j j i. Since, for any permutation σ S n, i j j i ζ S n, σ P A c T 1σ(1)... ct nσ(n), c I 1σ(1)... ci nσ(n), c F 1σ(1)... cf nσ(n) σ S n σ S n σ S n a T 1ζ(1)... at nζ(n), a I 1ζ(1)... ai nζ(n), a F 1ζ(1)... af nζ(n) ζ S n ζ S n ζ S n A. The case of AP is similar to the above proof. 6
7 Definition 3.5. Let A ( a T ij, a I ij, a F ij ), be a m n FNSM then the transpose of A is defined by, A T ( a T ji, a I ji, a F ji ). Theorem 3.6. Let A ( a T ij, a I ij, a F ij ) be a FNSM then det(a) det(a T ), where A T denotes the transpose of A. Proof. Let A T ( b T ij, b I ij, b F ij ). Since each permutation σ is one -to-one function, we have A T b T 1σ(1)... bt nσ(n), b I 1σ(1)... bi nσ(n), b F 1σ(1)... bf nσ(n) σ S n σ S n σ S n a T σ(1)1... at σ(n)n, a I σ(1)1... ai σ(n)n, a F σ(1)1... af σ(n)n σ S n σ S n σ S n a T 1ζ(1)... at nζ(n), a I 1ζ(1)... ai nζ(n), a F 1ζ(1)... af nζ(n), ζ S n ζ S n ζ S n where the permutations ζ is induced by the rearrangement of each σ in S n A. Theorem 3.7. Let A ( a T ij, a I ij, F ij ) be an n n FNSM. If A contains a zero row (column) then A 0, 0, 1. Proof. Each term in A contains a factor of each row(column) and hence a factor of zero row (column). Thus each term of A is equal to zero, and consequently A 0, 0, 1. Hence zero means element of the form 0, 0, 1. Theorem 3.8. Let A (a T ij, a I ij, a F ij ) be an n n FNSM, If A is triangular, then the determinant of A, A a T ii, a I ii, 1 i n 1 i n a F ii 1 i n Proof. Suppose that A (a T ij, a I ij, aij F ) is lower triangular. We consider the term of A that t a T a iσ(i), t a I a iσ(i), t a F a iσ(i). 1 i n 1 i n 1 i n Let σ(1) 1. Then 1 < σ(1) and so a T 1σ(1) 0, ai 1σ(1) 0, af 1σ(1) 1. This means that t a T 0, t a I 0, t a F 1. If σ(1) 1. Now, let σ(1) 1 and σ(2) 2 then 2 < σ(2) and a T 2σ(2) 0, ai 2σ(2) 0, a F 2σ(2) 1, and t a T 0, t a I 0, t a F 1, This means that t a T 0, t a I 0, t af 1, if σ(1) 1 or σ(2) 2. Therefore, in this method, we know that each of terms t a T, t a I, t a F, for σ(1) 1, σ(2) 2...σ(n) n must be zero, zero, one respectively, Consequently, 7
8 ( A 1 i n a T ii, a I ii, a F ii 1 i n 1 i n ). The following theorem is evident from the definition of determinant of FNSM. Theorem 3.9. Let A and B be two FNSM. Then AB A B. 4 The Adjoint of FNSM Definition 4.1. The adjoint of an n n FNSM A denoted by adja, is defined as follows b ij A ji is the determinant of the (n 1) (n 1) FNSM formed by deleting row j and column i from A and B adja. Remark 4.2. We can write the element b ij of adja B (b ij ) as follows: b ij a T tπ(t), ai tπ(t), af tπ(t) π S nj n i t n j where n j {1, 2, 3...n} {j} and S nj n i is the set of all permutation of set n j over the set n i. 0.2, 0.5, 0 0.2, 0.3, 0.5 Example 4.3. Let A, 0.6, 0.2, , 0.7, 0.3 A11 A then adja 21 A 12 A 22 A , 0.7, 0.3 A , 0.2, 0.3 A , 0.3, 0.5 A , 0.5, 0 adja 0.6, 0.7, , 0.3, , 0.2, , 0.5, 0 Proposition 4.4. For n n FNSM A and B we have the following 1. A B implies adja adjb, 2. adja + adjb adj(a + B), 3. adja T (adja) T. Proof. (i) Let C adja and D adjb. That is c ij a T tπ(t), ai tπ(t), af tπ(t) and π S nj n i t n j d ij b T tπ(t), bi tπ(t), bf tπ(t). t n j π S nj n i 8
9 It is clear that c ij d ij since a T tπ(t) bt tπ(t) a I tπ(t) bi tπ(t) a F tπ(t) bf tπ(t) for every t j, π(t) i. (ii) Since A, B A + B, it is clear that adja, adjb adj(a + B) and so adja + adjb adj(a + B). (iii)let B adja and C adja T. Then b ij a T tπ(t), ai tπ(t), af tπ(t) and π S nj n i t n j c ij a T tπ(t), ai tπ(t), af tπ(t), π S nj n i π(t) n j which is the element b ji. Hence (adja) T adja T. Proposition 4.5. Let A be an n n FNSM. Then (1) A adja A I n, (2) (adja)a A I n. Proof. (1) Let C A adja. The i-th row of A is ( a T i1, a I i1, a F i1 a T i2, a I i2, a F i2..., a T in, a I in, a F in ). By the definition of adja, the j-th column of adja is given by ( A j1, A j2,..., A jn ) T. So that c T ij, c I ij, c F ij n at ik, ai ik, af ik A jk 0 and hence c T ii, c I ii, c F ii n at ik, ai ik, af ik A ik which is equal to A. Thus C AadjA A I n. (2) The proof is similar to (1). Proposition 4.6. If a FNSM matrix A has a zero row then (adja)a ( 0, 0, 1 ) (the zero matrix). Proof. Let H (adja)a. That is, h ij A ki a T kj ai kj af kj. If the i-th row of A k is zero, that means ( 0, 0, 1 ), then A ki contains a zero row where k i and so A ki 0, 0, 1 (by the Theorem 3.7) for every k i and if k i, then a ij 0 for every j and hence A ki a T kj, ai kj, af kj ( 0, 0, 1 ). k Thus (adja)a ( 0, 0, 1 ) 9
10 Theorem 4.7. For a FNSM A we have A adja. A 11 A 21 A n1 A 12 Proof. Since adja. A 22.. A n2. A 1n A 2n A nn we have adja A1π(1) A2π(2)... Anπ(n) π S n n Aiπ(i) π S n i1 n ( π S n i1 ( π S ni n π(i) ( π S n π S n1 n π(1) π S nn n π(n) a T tθ(t), ai tθ(t), af tθ(t) ) t n i a T tθ(t), ai tθ(t), af tθ(t) )( t n 1 t n n a T tθ(t), ai tθ(t), af tθ(t) ) π S n2 n π(2) t n 2 a T tθ(t), ai tθ(t), af tθ(t) )... ( a T tθ 1 (t), ai tθ 1 (t), af tθ )( n(t) a T tθ 2 (t), ai tθ 2 (t), af tπ 2 (t) )( a T tθ, n(t) ai tθ, n(t) af tθ ) n(t) π s n t n 1 t n 1 t n 1 for some θ 1 S n1 n π(1), θ 2 S n2 n π(1),...θ n S nnnπ(n) (a 2θ1 (2)a 3θ1 (3)...a nθ1 (n))(a 1θ2 (1)a 3θ2 (3)...a nθ2 (n))...(a 1θn(1)a 2θn(2)...a n 1θn(n 1)) π S n (a 1θ2 (1)a 1θ3 (1)...a 1θn(1))(a 2θ1 (2)a 2θ1 (2)...a 2θn(2))(a 3θ1 (3)a 3θ2 (3)a 3θ4 (3) π S n...a 3θn(3))...(a nθ1 (n)a nθ2 (n)...a nθn(n)) (a 1θf1 (1)a...a 2θf2 (2) nθ fn(n) for some f h {1, 2,..., n} {h}, h 1, 2,..., n. However because a hθfh (h) a hσ (f h ). We can see that a h θ fh h a hπ (f h ) therefore, π S n adja a 1σ(1) a 2σ(2)...a nσ(n), σ S n which is the expansion of A. This complete the proof. Definition 4.8. An m n FNSM A is said to be constant if a T ik, ai ik, af ik at jk, ai jk, af jk for all i, j, k, that is its row are equal to each other. Proposition 4.9. Let A be an n n constant FNSM Then we have: (1). (adja) T is constant, (2). C A(adjA) is constant and C ij A which is the least element in A. Proof. (1)Let B adja. Then b ij ( a T tπ(t), ai tπ(t), af tπ(t) ) and b ik t n j π S nj n i 10 π S nk n i t n k ( a T tπ(t), ai tπ(t), af tπ(t) ).
11 We notice that b ij b ik since the numbers π(t) of columns cannot be changed in the two expansion of b ij and b ik. So that (adja) T is constant. (2) Since A is constant we can see that A jk A ik and so A jk A ik for every i, j {1, 2,..., n}. Thus c ij n ( a T ik, a I ik, a F ik ) A jk n ( a T ik, a I ik, a F ik ) A ik A. Now, A a 1π(1) a 2π(2)...a nπ(n) π S n a 2π(2) a 3π(3)...a nπ(n) for any π S n (since A is constant). Taking π as the identity permutation we get A a 11 a 22...a nn which is the least element in A. Definition For a FNSM A F n n we have the following (1) If A I n, then A is called reflexive. (2) If a ii a ij, then A is called weakely reflexive for all i, j {1, 2,..., n} where A (a ij ) ( a T ij, a I ij, a F ij ) (3)If A A T, then A is called symmetric (4)If A A 2, then A is called idempotent (5)If A 2 A, then A is called transitive. Proposition Let A be an n n reflexive FNSM. Then adja A k where A k is idempotent and k n 1. Proof. The proof of the proposition is similar to fuzzy matrices refer?. Proposition Let A be an n n reflexive FNSM. Then we have the following: (1)adjA 2 (adja) 2 adja, (2)If A is idempotent, then adja A, (3)adjA is reflexive, (4)adj(adjA) adja, (5)adjA A, (6)A(adjA) (adja)a adja. 11
12 Proof. (1) Since A is reflexive, we get A 2 is also reflexive and adja 2 (A 2 ) k (A k ) 2 (adja) 2. But since A k is idempotent, we have (adja) 2 (adja). (2)We have by proposition 2.10 that adja A k (k n 1). But we have also that A is idempotent. So A k A. Thus adja A. (3) Let B adja. That is, ( b T iib I iib F ii ) a T tπ(t), ai tπ(t), af tπ(t). π S ni t n i Taking the identity permutation π(t) t we get ( b T ii, b T ii, b T ii ) a T 11a T 22...a T i 1i 1a T i+1i+1...a T nn, a I 11a I 22...a I i 1i 1a I i+1i+1...a I nn, a F 11a F 22...a F i 1i 1a F i+1i+1...a F nn ( 1, 1, 0 ) that is b T ii, b I ii, b F ii 1, 1, 0 and adja is thus reflexive. (4) Since A is reflexive, we get adja is idempotent by the above proposition and reflexive by (3). So that by (2) adj(adja) adja. (5) Let B adja. That is ( b T ijb I ijb F ij ) a T tπ(t), ai tπ(t), af tπ(t). π S nj n i t n j Taking the identity permutation π(h) h, π(i) j, h i, that is the permutation i j 1 j + 1 n j j 1 j + 1 n then a T 11a T 22...a T i 1i 1a T i+1i+1...a T nn, a I 11a I 22...a I i 1i 1a I i+1i+1...a I nn, a F 11a F 22...a F i 1i 1a F i+1i+1...a F nn is a term of b T ij, b I ij, b F ij. So that b T ij, b I ij, b F ij a T 11, a T 22...a T i 1i 1a T i+1i+1...a T nn a T ij, a I ij, a F ij. Therefore B adja A. (6) Let C A(adjA) and D (adja)a. Then c T ij, c I ij, c F ij n a T ik, ai ik, af ik A jk a T ii, a I ii, a F ii A ji A ji ( b T ij, b I ij, b F ij ) and d ij n A ki a T kj, ai kj, af kj A ji a T jj, a I jj, a F jj A ji ( b T ij, b I ij, b F ij ). Thus we have A(adjA) adja and (adja)a adja. But by (1) and (5) and proposition 4.11 we see that adja (adja)(adja) AadjA. So that A(adjA) adja. Also adja (adja)(adja) (adja)a so that (adja)a adja. Thus we get A(adjA) (adja)a adja. 12
13 Example LetA T hen A 11 1, 1, 0, A , 0.2, 0.3 A , 0.3, 0.5, A 22 1, 1, 0 A 2 A 2 Aistransitive. A11 A adja 21 A 12 A 22 adja A(adjA) (adja)a (adja)a AadjA. It is clear that the above example satisfies of the above Theorem. Definition An n n FNSM A is called circular if and only if (A 2 ) T A, or more explicitly, a T jk, ai jk, af jk at ki, ai ki, af ki at ij, a I ij, a F ij for every k 1, 2,...n. Theorem For an n n FNSM A we have the following: (1)If A is symmetric, then adja is symmetric, (2)If A is transitive, then adja is transitive, 13
14 (3) If A is circular, then adja is circular. Proof. (1) Let B adja. Then b T ij, b I ij, b F ij a T tπ(t), ai tπ(t), af tπ(t) π S nj n i t n j a T π(t)t, ai π(t)t, af π(t)t ( bt ij, b I ij, b F ij ). π S ni n j t n i (since A is symmetric). (2)Let D A ij. We can determine the elements of D in terms of the elements of A as follows: a T hk, ai hk, af hk if h < i, k < j, d T hk, di hk, dk hk a T (h+1)k, ai (h+1)k, af (h+1)k if h i, k < j, a T h(k+1), ai h(k+1), af h(k+1) if h < i, k j, a T (h+1)(k+1), ai (h+1)(k+1), af (h+1)(k+1) if h i, k j, where A ij denotes the (n 1) (n 1) FNSM obtained from A by deleting the i th row and column j. Now we show that A st A tu A su for every t {1, 2,...n}. Let R A st, C A tu, F A su and W A st A tu. Note that A is transitive. Then wij, T wij, I wij F n 1 rik T, ri ik, rf ik ct kj, ci kj, cf kj n 1 a T ik at kj, ai ik ai kj, af ik af kj at ij, a I ij, a F ij fij T, fij, I fij F if i < s, k < t, j < u, n 1 a T ik at k(j+1), ai ik ai k(j+1), af ik af k(j+1) at i(j+1), ai i(j+1), af i(j+1) fij T, fij, I fij F if i < s, k < t, j u, n 1 a T i(k+1) at (k+1)j, ai i(k+1) ai (k+1)j, af i(k+1) af (k+1)j at ij, a I ij, a F ij fij T, fij, I fij F if i < s, k t, j < u, n 1 a T i(k+1) at (k+1)(j+1), ai i(k+1) ai (k+1)(j+1), af i(k+1) af (k+1)(j+1) a T i(j+1), ai i(j+1), af i(j+1) f ij T, fij, I fij F if i < s, k t, j u, n 1 a T (i+1)k at kj, ai (i+1)k ai kj, af (i+1)k af kj a T (i+1)j, ai (i+1)j, af (i+1)j f T ij, f I ij, f F ij if i s, k < t, j < u, 14
15 a T (i+1)(k+1) at (k+1)j, ai (i+1)(k+1) ai (k+1)j, af (i+1)(k+1) af (k+1)j n 1 a T (i+1)j, ai (i+1)j, af (i+1)j f ij T, fij, I fij F if i s, k t, j < u, n 1 a T (i+1)(k+1) at (k+1)(j+1), ai (i+1)(k+1) ai (k+1)(j+1), af (i+1)(k+1) af (k+1)(j+1) a T (i+1)(j+1), ai (i+1)(j+1), af (i+1)(j+1) f ij T, fij, I fij F if i s, k t, j < u, n 1 a T (i+1)k at k(j+1), ai (i+1)k ai k(j+1), af (i+1)k af k(j+1) a T (i+1)(j+1), ai (i+1)(j+1), af (i+1)(j+1) f T ij, f I ij, f F ij if i s, k < t, j u, Thus w ij f ij in every case and therefore a T st, a I st,a F st A tu A su. for every t {1, 2,...n} By theorem (3.9) we get A st A tu A su, This means that b T ts, b I ts, b F ts b T ut, b I ut, b F ut b T us, b I us, b F us, that is b T ut, b I ut, b F ut b T ts, b I ts, b F ts b T us, b I us, b F us, for every t 1, 2,..., n. Hence B adja is transitive. (3) Similarly, as in (2) we can show that A st A tu A us. For every t 1, 2,..., n so that A st A tu A T us Aus. Thus b T st, b I st, b F st b T tu, b I tu, b F tu b T us, b I us, b F us, and B adja is circular. Corollary If a FNSM A is similarity then AadjA is also Similarity. Theorem For any n n FNSM A, the FNSM AadjA is transitive. Proof. Let C AadjA, thatis n c ij a T ik, a I ik, a F ik A jk a T if, a I if, a F if A jf forsomef {1, 2, 3,..n}, and n c 2 ij c is c sj s1 n n ( ( a T il, a I il, a F il A sl ) s1 l1 n a T st, a I st, a F st A jt t1 n a T ih, a I ih, a F ih A sh a T su, a I su, a F su A ju s1 a T ih, a I ih, a F ih A ju 15
16 a T if, a I jf, a F jf A jf, forsomeh, u {1, 2,..., n}.thus(aadja) 2 AadjA. 0.1, 0, , 0.6, 0.7 Example LetA be a FNSM 0.2, 0.5, , 0.2, , 0.2, , 0.6, 0.7 Then (adja) 0.2, 0.5, , 0, , 0, , 0.6, 0.7 A(adjA) 0.2, 0.5, 0.3.6,.2, , 0.5, , 0, , 0.2, , 0.5, 0.3 (AadjA) 2 0.2, 0.5, , 0.0, , 0.2, , 0.5, 0.3 (AadjA) 2 0.2, 0.5, , 0, , 0.2, , 0.5, 0.3 (AadjA) 2 (AadjA) is also transitive.. 0.6, 0.2, , 0.6, , 0.5, , 0, , 0.5, , 0, , 0.2, , 0.5, 0.3 We omit the proofs for type-ii FNSM as the proofs are analogous to type-i FNSM. Conclusion: In this paper we have introduced determinant and adjoint of two types of FNSMs and discussed some of its properties. References 1 K. Atanassov, Intuitionistic fuzzy sets, Fuzzy sets and systems, Vol. no 20, 1986, J.B Kim, A. Baartmans, Determinant Theory for Fuzzy Matrices, Fuzzy sets and systems, Vol 29, 1989, J.B. Kim, Idempotents and Inverse in Fuzzy Matrices, Malayasian Math, Vol. no 6(2), 1988, Managent Science. 4 J.B. Kim, Inverse of Boolean Matrices, Bull. Inst. Math Acod, Science Vol. no 12 (2), 1984, Mamouni Dhar, Said Broumi, Florentin Smarandache, A Nite on Square Neutrosophic Fuzzy Matrices, Vol. no 3,
17 6 D. Molodtsov, Soft set theory first results, Computer and mathematics with applications,vol. no 37, 1999, S.V Ovehinnikov, Structure of fuzzy relations, Fuzzy sets and systems, Vol. no 6, 1981, P. Rajarajeswari and P. Dhanalakshmi,intuitionistic fuzzy soft matrix theory and its application in medical diagnosis, Annals of Fuzzy Mathematics and informatics, Vol. no 7 (5), 2014, F. Smarandache, Neutrosophic set, a generalisation of the intuitionistic fuzzy set, Inter. J.Pure ApplMath. Vol. no 24, 2005, I.R. Sumathi and I. Arockiarani, New operations on Fuzzy Neutrosophic soft Matrices, International Journal of innovative Research and studies, Vol. no 3 (3), 2014, Michel G. Thomason, Convergence of powers of a fuzzy matrix,journal of mathematical analysis and applications, Vol. no 57, 1977, R. Uma, P. Murugadas and S. Sriram,Fuzzy Neutrosophic Soft Matrices of Type- I and Type-II, Communicated. 13 Yong Yang and Chenli Ji., Fuzzy soft matrices and their application, Part I,LNAI 7002; 2011, L. A. Zadeh, Fuzzy sets, Information and control, Vol. no 8, 1965, L. A. Zadeh, The concept of a linguistic variable and its application to approximate reasoning, Information Science, 8(3), 1975,
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