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A cardinal method to solve coupled nonlinear variable-order time fractional sine-Gordon equations

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Abstract

In this study, a computational approach based on the shifted second-kind Chebyshev cardinal functions (CCFs) is proposed for obtaining an approximate solution of coupled variable-order time-fractional sine-Gordon equations where the variable-order fractional operators are defined in the Caputo sense. The main ideas of this approach are to expand the unknown functions in tems of the shifted second-kind CCFs and apply the collocation method such that it reduces the problem into a system of algebraic equations. To algorithmize the method, the operational matrix of variable-order fractional derivative for the shifted second-kind CCFs is derived. Meanwhile, an effective technique for simplification of nonlinear terms is offered which exploits the cardinal property of the shifted second-kind CCFs. Several numerical examples are examined to verify the practical efficiency of the proposed method. The method is privileged with the exponential rate of convergence and provides continuous solutions with respect to time and space. Moreover, it can be adapted for other types of variable-order fractional problems straightforwardly.

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Authors and Affiliations

  1. Department of Mathematics, Shiraz University of Technology, Shiraz, Iran

    Mohammad Hossein Heydari

  2. Department of Mathematical Sciences, Xi’an Jiaotong-Liverpool University, Suzhou, 215123, Jiangsu, China

    Zakieh Avazzadeh

  3. Hunan Key Laboratory for Computation and Simulation in Science and Engineering, Key Laboratory of Intelligent Computing, Information Processing of Ministry of Education, School of Mathematics and Computational Science, Xiangtan University, Xiangtan, Hunan, 411105, China

    Yin Yang

  4. Engineering School (DEIM), University of Tuscia, Viterbo, Italy

    Carlo Cattani

Authors
  1. Mohammad Hossein Heydari
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  2. Zakieh Avazzadeh
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  3. Yin Yang
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  4. Carlo Cattani
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Corresponding author

Correspondence to Mohammad Hossein Heydari.

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Communicated by José Tenreiro Machado.

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Heydari, M.H., Avazzadeh, Z., Yang, Y. et al. A cardinal method to solve coupled nonlinear variable-order time fractional sine-Gordon equations. Comp. Appl. Math. 39, 2 (2020). https://doi.org/10.1007/s40314-019-0936-z

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  • DOI: https://doi.org/10.1007/s40314-019-0936-z

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