University of TabrizComputational Methods for Differential Equations2345-39825120170101Numerical analysis of fractional order model of HIV-1 infection of CD4+ T-cells1115825ENFazalHaqDepartment of Mathematics,
Hazara University Mansehra, PakistanKamalShahDepartment of Mathematics,
University of Malakand, Chakadara Dir(L),
Khyber Pakhtunkhwa, PakistanGhaus-UR-RahmanDepartment of Mathematics and Statistics,
University of Swat, PakistanMuhammadShahzadDepartment of Mathematics,
Hazara University Mansehra, PakistanJournal Article20161026In this article, we present a fractional order HIV-1 infection model of CD4+ T-cell. We analyze the effect of the changing the average number of the viral particle N with initial conditions of the presented model. The Laplace Adomian decomposition method is applying to check the analytical solution of the problem. We obtain the solutions of the fractional order HIV-1 model in the form of infinite series. The concerned series rapidly converges to its exact value. Moreover, we compare our results with the results obtained by Runge-Kutta method in case of integer order derivative.https://cmde.tabrizu.ac.ir/article_5825_f4866fc1855d93e48a17375f970401ef.pdfUniversity of TabrizComputational Methods for Differential Equations2345-39825120170101Interval fractional integrodifferential equations without singular kernel by fixed point in partially ordered sets12295832ENRobabAlikhaniDepartment of Mathematics,
University of Tabriz, Tabriz, Iran0000-0002-4139-9834Journal Article20170102This work is devoted to the study of global solution for initial value problem of interval fractional integrodifferential equations involving Caputo-Fabrizio fractional derivative without singular kernel admitting only the existence of a lower solution or an upper solution. Our method is based on fixed point in partially ordered sets. In this study, we guaranty the existence of special kind of interval H-difference that we will be faced it under weak conditions. The method is illustrated by an examples.https://cmde.tabrizu.ac.ir/article_5832_a153da52e918984455148c1c2bcc3054.pdfUniversity of TabrizComputational Methods for Differential Equations2345-39825120170101New Solutions for Fokker-Plank Equation of Special Stochastic Process via Lie Point Symmetries30425860ENElhamDastranjDepartment of Mathematics, Shahrood University of Technology,
Shahrood, Semnan, IranS. RezaHejaziDepartment of Mathematics, Shahrood University of Technology,
Shahrood, Semnan, IranJournal Article20161207In this paper Lie symmetry analysis is applied in order to find new solutions for Fokker Plank equation of Ornstein-Uhlenbeck process. This analysis classifies the solutions format of the Fokker Plank equation by using the Lie algebra of the symmetries of our considered stochastic process.https://cmde.tabrizu.ac.ir/article_5860_0619691dc5e6d56d4bebd5478457bf27.pdfUniversity of TabrizComputational Methods for Differential Equations2345-39825120170101Numerical solution of the forced Duffing equations using Legendre multiwavelets43555861ENRaminNajafiDepartment of Mathematics
Maku Branch, Islamic Azad University,
Maku, Iran0000-0003-2432-2947BehzadNemati SarayFaculty of Mathematics,
Institute for Advanced Studies in Basic Sciences, Zanjan, IranJournal Article20161212A numerical technique based on the collocation method using Legendre multiwavelets are presented for the solution of forced Duffing equation. The operational matrix of integration for Legendre multiwavelets is presented and is utilized to reduce the solution of Duffing equation to the solution of linear algebraic equations. Illustrative examples are included to demonstrate the validity and applicability of the new technique.https://cmde.tabrizu.ac.ir/article_5861_ca3f0ed7de5017b87aa945ff661cf787.pdfUniversity of TabrizComputational Methods for Differential Equations2345-39825120170101Sinc operational matrix method for solving the Bagley-Torvik equation56665868ENMohammad-RezaAziziDepartment of Mathematics, Faculty of Sciences,
Azarbaijan Shahid Madani University, Tabriz, IranAliKhaniDepartment of Mathematics, Faculty of Sciences,
Azarbaijan Shahid Madani University, Tabriz, IranJournal Article20170113The aim of this paper is to present a new numerical method for solving the Bagley-Torvik equation. This equation has an important role in fractional calculus. The fractional derivatives are described based on the Caputo sense. Some properties of the sinc functions required for our subsequent development are given and are utilized to reduce the computation of solution of the Bagley-Torvik equation to some algebraic equations. It is well known that the sinc procedure converges to the solution at an exponential rate. Numerical examples are included to demonstrate the validity and applicability of the technique.https://cmde.tabrizu.ac.ir/article_5868_fdcacac6135f0bb82c1b80f8d91e4a6b.pdfUniversity of TabrizComputational Methods for Differential Equations2345-39825120170101The operational matrix of fractional derivative of the fractional-order Chebyshev functions and its applications67875902ENMohammadrezaAhmadi DaraniDepartment of Applied Mathematics, Faculty of Mathematical Sciences,
Shahrekord University, P. O. Box 115, Shahrekord, IranAbbasSaadatmandiDepartment of Applied Mathematics, Faculty of Mathematical Sciences,
University of Kashan, Kashan, 87317-51167, IranJournal Article20161024In this paper, we introduce a family of fractional-order Chebyshev functions based on the classical Chebyshev polynomials. We calculate and derive the operational matrix of derivative of fractional order $gamma$ in the Caputo sense using the fractional-order Chebyshev functions. This matrix yields to low computational cost of numerical solution of fractional order differential equations to the solution of a system of algebraic equations. Several numerical examples are given to illustrate the accuracy of our method. The results obtained, are in full agreement with the analytical solutions and numerical results presented by some previous works.https://cmde.tabrizu.ac.ir/article_5902_97563e2dfae2abcda93be4bd14ba9e1c.pdf