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Analytical Solutions of the Fractional Mathematical Model for the Concentration of Tumor Cells for Constant Killing Rate

Author

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  • Najma Ahmed

    (Abdus Salam School of Mathematical Sciences, GC University, Lahore 5400, Pakistan
    These authors contributed equally to this work and are first co-authors.)

  • Nehad Ali Shah

    (Department of Mechanical Engineering, Sejong University, Seoul 05006, Korea
    Department of Mathematics, Lahore Leads University, Lahore 5400, Pakistan)

  • Farman Ali

    (Department of Software, Sejong University, Seoul 05006, Korea
    These authors contributed equally to this work and are first co-authors.)

  • Dumitru Vieru

    (Department of Theoretical Mechanics, Technical University “Gheorghe Asachi” of Iasi, 6600 Iasi, Romania)

  • F.D. Zaman

    (Abdus Salam School of Mathematical Sciences, GC University, Lahore 5400, Pakistan)

Abstract

Two generalized mathematical models with memory for the concentration of tumor cells have been analytically studied using the cylindrical coordinate and the integral transform methods. The generalization consists of the formulating of two mathematical models with Caputo-time fractional derivative, models that are suitable to highlight the influence of the history of tumor evolution on the present behavior of the concentration of cancer cells. The time-oscillating concentration of cancer cells has been considered on the boundary of the domain. Analytical solutions of the fractional differential equations of the mathematical models have been determined using the Laplace transform with respect to the time variable and the finite Hankel transform with respect to the radial coordinate. The positive roots of the transcendental equation with Bessel function J 0 ( r ) = 0 , which are needed in our study, have been determined with the subroutine r n = r o o t ( J 0 ( r ) , r , ( 2 n − 1 ) π / 4 , ( 2 n + 3 ) π / 4 ) , n = 1 , 2 , … of the Mathcad 15 software. It is found that the memory effects are stronger at small values of the time, t. This aspect is highlighted in the graphical illustrations that analyze the behavior of the concentration of tumor cells. Additionally, the concentration of cancer cells is symmetric with respect to radial angle, and its values tend to be zero for large values of the time, t.

Suggested Citation

  • Najma Ahmed & Nehad Ali Shah & Farman Ali & Dumitru Vieru & F.D. Zaman, 2021. "Analytical Solutions of the Fractional Mathematical Model for the Concentration of Tumor Cells for Constant Killing Rate," Mathematics, MDPI, vol. 9(10), pages 1-14, May.
    • Handle: RePEc:gam:jmathe:v:9:y:2021:i:10:p:1156-:d:558687
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    References listed on IDEAS

    as
    1. H. J. Haubold & A. M. Mathai & R. K. Saxena, 2011. "Mittag-Leffler Functions and Their Applications," Journal of Applied Mathematics, Hindawi, vol. 2011, pages 1-51, May.
    2. Manoj P. Tripathi & B. P. Singh & Om P. Singh, 2014. "Stable Numerical Evaluation of Finite Hankel Transforms and Their Application," International Journal of Analysis, Hindawi, vol. 2014, pages 1-11, November.
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