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Exact results on some nonlinear Laguerre-type diffusion equations

    Roberto Garra   Affiliation
    ; Zivorad Tomovski   Affiliation

Abstract

In this paper we obtain some new explicit results for nonlinear equations involving Laguerre derivatives in space and/or in time. In particular, by using the invariant subspace method, we have many interesting cases admitting exact solutions in terms of Laguerre functions. Nonlinear diffusive-type and telegraph-type equations are considered and also the space and time-fractional counterpart are analyzed, involving Caputo or Prabhakar-type derivatives. The main aim of this paper is to point out that it is possible to construct many new interesting examples of nonlinear diffusive equations with variable coefficients admitting exact solutions in terms of Laguerre and Mittag-Leffler functions.

Keyword : Laguerre derivatives, nonlinear partial differential equations, invariant subspace methods, exact solutions

How to Cite
Garra, R., & Tomovski, Z. (2021). Exact results on some nonlinear Laguerre-type diffusion equations. Mathematical Modelling and Analysis, 26(1), 72-81. https://doi.org/10.3846/mma.2021.11270
Published in Issue
Jan 18, 2021
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This work is licensed under a Creative Commons Attribution 4.0 International License.

References

G. Bretti and P.E. Ricci. Laguerre-type special functions and population dynamics. Applied mathematics and computation, 187(1):89–100, 2007. https://doi.org/10.1016/j.amc.2006.08.106

S. Choudhary and V. Daftardar-Gejji. Invariant subspace method: a tool for solving fractional partial differential equations. Fractional Calculus and Applied Analysis, 20(2):477–493, 2017. https://doi.org/10.1515/fca-2017-0024

G. Dattoli, M.X. He and P.E. Ricci. Eigenfunctions of Laguerre-type operators and generalized evolution problems. Math. Comput. Model., 42:1263–1268, 2005. https://doi.org/10.1016/j.mcm.2005.01.034

G. Dattoli and P.E. Ricci. Laguerre-type exponents and the relevant L-circular and L-hyperbolic functions. Georgian Math. J., 20(2):477–493, 2017.

V. Galaktionov and S. Svirshchevskii. Exact solutions and invariant subspaces of nonlinear partial differential equations in mechanics and physics. Chapman and Hall/CRC applied mathematics and nonlinear science series, 2007. https://doi.org/10.1201/9781420011623

R. Garra, R.Gorenflo, F. Polito and Z. Tomovski. Hilfer-Prabhakar derivatives and some applications. Applied Mathematics and Computation, 242:576–589, 2014. https://doi.org/10.1016/j.amc.2014.05.129

R.K. Gazizov and A.A. Kasatkin. Construction of exact solutions for fractional order differential equations by the invariant subspace method. Computers & Mathematics with Applications, 66(5):576–584, 2013. https://doi.org/10.1016/j.camwa.2013.05.006

A. Giusti, I. Colombaro, R. Garra, R. Garrappa, F. Polito, M. Popolizio and F. Mainardi. A practical guide to Prabhakar fractional calculus. Fractional Calculus and Applied Analysis, 23(1):9–54, 2020. https://doi.org/10.1515/fca2020-0002

R. Gorenflo, A.A. Kilbas, F. Mainardi and S.V. Rogosin. MittagLeffler functions, related topics and applications. Springer, Berlin, 2014. https://doi.org/10.1007/978-3-662-43930-2

M.S. Hashemi. Invariant subspaces admitted by fractional differential equations with conformable derivatives. Chaos, Solitons & Fractals, 107:161–169, 2018. https://doi.org/10.1016/j.chaos.2018.01.002

A. Jannelli, M. Ruggieri and M.P. Speciale. Exact and numerical solutions of time-fractional advectiondiffusion equation with a nonlinear source term by means of the Lie symmetries. Nonlinear Dynamics, 92(2):543–555, 2018. https://doi.org/10.1007/s11071-018-4074-8

A.A. Kilbas, H.M. Srivastava and J.J. Trujillo. Theory and applications of fractional differential equations. Elsevier Science Limited, 2006.

R. Najafi, F. Bahrami and M.S. Hashemi. Classical and nonclassical lie symmetry analysis to a class of nonlinear time-fractional differential equations. Nonlinear Dynamics, 87(3):1785–1796, 2017. https://doi.org/10.1007/s11071-016-3152-z

P. Prakash. New exact solutions of generalized convection-reactiondiffusion equation. European Physical Journal Plus, 134(6):261, 2019. https://doi.org/10.1140/epjp/i2019-12657-3

W. Rui. Idea of invariant subspace combined with elementary integral method for investigating exact solutions of time-fractional NPDEs. Applied Mathematics and Computation, 339(3):158–171, 2018. https://doi.org/10.1016/j.amc.2018.07.033

T. Sandev and Z. Tomovski. Fractional Equations and Models. Theory and Applications. Springer, 2019. https://doi.org/10.1007/978-3-030-29614-8

G.W. Wang and M.S. Hashemi. Lie symmetry analysis and soliton solutions of time-fractional k(m,n) equation. Pramana, 88(1):7, 2017. https://doi.org/10.1007/s12043-016-1320-9

K.V. Zhukovsky. Operational solution for some types of second order differential equations and for relevant physical problems. Journal of Mathematical Analysis and Applications, 446(1):628–647, 2017. https://doi.org/10.1016/j.jmaa.2016.08.054