2018-02-18T13:20:07Z
http://msj.iau-arak.ac.ir/?_action=export&rf=summon&issue=110828
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Approximation of the n-th Root of a Fuzzy Number by Polynomial Form Fuzzy Numbers
مجید
امیر فخریان
In this paper we introduce the root of a fuzzy number, and we present aniterative method to nd it, numerically. We present an algorithm to generatea sequence that can be converged to n-th root of a fuzzy number.
2012
03
01
1
16
http://msj.iau-arak.ac.ir/article_514426_43e071b3d85561bc60fc758643f8024a.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Application of variational iteration method for solving singular two point boundary value problems
شادان
صدیق بهزادی
In this paper, He's highly prolic variational iteration method is applied ef-fectively for showing the existence, uniqueness and solving a class of singularsecond order two point boundary value problems. The process of nding solu-tion involves generation of a sequence of appropriate and approximate iterativesolution function equally likely to converge to the exact solution of the givenproblem which being processed out and improvised on its own at every step re-cursively. Moreover, Illustrative examples available to the context in literaturewhen treated with, by application of such proposed method fetch encouragingresults so as to justify and reveal its eciency and usefulness of the method.
2012
03
01
17
29
http://msj.iau-arak.ac.ir/article_514437_b8788ad5b66ec51e6084ae07983eef81.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Common fixed point theorems of contractive mappings sequence in partially ordered G-metric spaces
لیلا
قلی زاده
We consider the concept of Ω-distance on a complete partially ordered G-metric space and prove some common fixed point theorems.
2012
03
01
31
45
http://msj.iau-arak.ac.ir/article_514440_7dfaed38f82adf87f581c79d6bf77f88.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
The tanh method for solutions of the nonlinear modied Korteweg de Vries equation
مسعود
کریمی
In this paper, we have studied on the solutions of modied KdV equation andalso on the stability of them. We use the tanh method for this investigationand given solutions are good-behavior. The solution is shock wave and can beused in the physical investigations
2012
03
01
47
54
http://msj.iau-arak.ac.ir/article_514449_147fbdd56b84fcb044c570a333d66931.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
New solution of fuzzy linear matrix equations
محمود
اوتادی
In this paper, a new method based on parametric form for approximate solu-tion of fuzzy linear matrix equations (FLMEs) of the form AX = B; where Ais a crisp matrix, B is a fuzzy number matrix and the unknown matrix X one,is presented. Then a numerical example is presented to illustrate the proposedmodel.
2012
03
01
55
66
http://msj.iau-arak.ac.ir/article_514450_2c134654159294fee620a7462396e580.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Application of variational iteration method for solving singular two point boundary value problem
محسن
رستمی مالخلیفه
ه
صالح
DEA methodology allows DMUs to select the weights freely, so in the optimalsolution we may see many zeros in the optimal weight. to overcome this prob-lem, there are some methods, but they are not suitable for evaluating DMUswith fuzzy data. In this paper, we propose a new method for solving fuzzyDEA models with restricted multipliers with less computation, and comparethis method with Liu''''''''[11]. Finally, by the proposed method, we evaluate a ex-ible manufacturing system with little computation, and then we compared thecomputational complexity of our proposed method with that of liu''''''''s method.
2012
03
01
67
78
http://msj.iau-arak.ac.ir/article_514451_0e062f9808bc322fc78b4df7358ef021.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Evaluating the solution for second kind nonlinear Volterra Fredholm integral equations using hybrid method
احمد
شهسواران
اکبر
شهسواران
In this work, we present a computational method for solving second kindnonlinear Fredholm Volterra integral equations which is based on the use ofHaar wavelets. These functions together with the collocation method are thenutilized to reduce the Fredholm Volterra integral equations to the solution ofalgebraic equations. Finally, we also give some numerical examples that showsvalidity and applicability of the technique.
2012
03
01
79
93
http://msj.iau-arak.ac.ir/article_514452_fe2c8fd8c4e9403ca4dffb3ffa9c6ecd.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
Homological dimensions of complexes of R-modules
ن
طیارزاده
اسمعیل
حسینی
َش
نیک نژاد
Let R be an associative ring with identity, C(R) be the category of com-plexes of R-modules and Flat(C(R)) be the class of all at complexes of R-modules. We show that the at cotorsion theory (Flat(C(R)); Flat(C(R))−)have enough injectives in C(R). As an application, we prove that for each atcomplex F and each complex Y of R-modules, Exti (F,X)= 0, whenever Ris n-perfect and i > n.
2012
03
01
95
103
http://msj.iau-arak.ac.ir/article_514453_bb1bb8affb7bd085b0592682642ff05f.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
A note on positive deniteness and stability of interval matrices
هانا
ویسه
It is proved that by using bounds of eigenvalues of an interval matrix, someconditions for checking positive deniteness and stability of interval matricescan be presented. These conditions have been proved previously with variousmethods and now we provide some new proofs for them with a unity method.Furthermore we introduce a new necessary and sucient condition for checkingstability of interval matrices.
2012
03
01
105
113
http://msj.iau-arak.ac.ir/article_514454_931070a5b2c71d54ffa1b791fc25daab.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2012
9
1
A numerical solution of a Kawahara equation by using Multiquadric radial basis function
م
ضارب نیا
م.
تختی
In this article, we apply the Multiquadric radial basis function (RBF) interpo-lation method for nding the numerical approximation of traveling wave solu-tions of the Kawahara equation. The scheme is based on the Crank-Nicolsonformulation for space derivative. The performance of the method is shown innumerical examples.
2012
03
01
115
125
http://msj.iau-arak.ac.ir/article_514455_dd7fdc8d676a69dc1a71ef26a81a6454.pdf