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  • List of Articles


      • Open Access Article

        1 - Hilbert modules over pro-C*-algebras
        M. Azhini N. Haddadzadeh
        In this paper, we generalize some results from Hilbert C*-modules to pro-C*-algebra case. We also give a new proof of the known result that l2(A) is aHilbert module over a pro-C*-algebra A.
        In this paper, we generalize some results from Hilbert C*-modules to pro-C*-algebra case. We also give a new proof of the known result that l2(A) is aHilbert module over a pro-C*-algebra A. Manuscript profile
      • Open Access Article

        2 - Some notes on convergence of homotopy based methods for functional equations
        A. Azizi J. Saiedian E. Babolian
        Although homotopy-based methods, namely homotopy analysis method andhomotopy perturbation method, have largely been used to solve functionalequations, there are still serious questions on the convergence issue of thesemethods. Some authors have tried to prove convergenc More
        Although homotopy-based methods, namely homotopy analysis method andhomotopy perturbation method, have largely been used to solve functionalequations, there are still serious questions on the convergence issue of thesemethods. Some authors have tried to prove convergence of these methods, butthe researchers in this article indicate that some of those discussions are faulty.Here, after criticizing previous works, a sucient condition for convergence ofhomotopy methods is presented. Finally, examples are given to show that evenif the homotopy method leads to a convergent series, it may not converge tothe exact solution of the equation under consideration. Manuscript profile
      • Open Access Article

        3 - Common xed point theorem for w-distance with new integral type contraction
        E. Firouz S. J. Hosseini Ghoncheh
        Boujari [5] proved a fi xed point theorem with an old version of the integraltype contraction , his proof is incorrect. In this paper, a new generalizationof integral type contraction is introduced. Moreover, a fixed point theorem isobtained.
        Boujari [5] proved a fi xed point theorem with an old version of the integraltype contraction , his proof is incorrect. In this paper, a new generalizationof integral type contraction is introduced. Moreover, a fixed point theorem isobtained. Manuscript profile
      • Open Access Article

        4 - Application of iterative Jacobi method for an anisotropic di usion in image processing
        M. Knanian A. Davari
        Image restoration has been an active research area. Di erent formulations are e ective in high qualityrecovery. Partial Di erential Equations (PDEs) have become an important tool in image processingand analysis. One of the earliest models based on PDEs is Perona-Malik m More
        Image restoration has been an active research area. Di erent formulations are e ective in high qualityrecovery. Partial Di erential Equations (PDEs) have become an important tool in image processingand analysis. One of the earliest models based on PDEs is Perona-Malik model that is a kindof anisotropic di usion (ANDI) lter. Anisotropic di usion lter has become a valuable tool indi erent elds of image processing specially denoising. This lter can remove noises without degradingsharp details such as lines and edges. It is running by an iterative numerical method. Therefore, afundamental feature of anisotropic di usion procedure is the necessity to decide when to stop theiterations. This paper proposes the modi ed stopping criterion that from the viewpoints of complexityand speed is examined. Experiments show that it has acceptable speed without su ering from theproblem of computational complexity. Manuscript profile
      • Open Access Article

        5 - The e ect of indicial equations in solving inconsistent singular linear system of equations
        M. Nikuei M.K. Mirnia
        The index of matrix A in Cn.n is equivalent to the dimension of largest Jor-dan block corresponding to the zero eigenvalue of A. In this paper, indicialequations and normal equations for solving inconsistent singular linear systemof equations are investigated.
        The index of matrix A in Cn.n is equivalent to the dimension of largest Jor-dan block corresponding to the zero eigenvalue of A. In this paper, indicialequations and normal equations for solving inconsistent singular linear systemof equations are investigated. Manuscript profile