Accurate solution of the Thomas-Fermi equation using the fractional order of rational Chebyshev functions

作者：Parand Kourosh^*; Delkhosh Mehdi

来源：Journal of Computational and Applied Mathematics, 2017, 317: 624-642.

DOI：10.1016/j.cam.2016.11.035

• Thomas-Fermi equation
• Fractional order of rational Chebyshev functions
• Quasilinearization method
• Collocation method
• Nonlinear ODE
• Semi-infinite domain

In this paper, the nonlinear singular Thomas-Fermi differential equation for neutral atoms is solved using the fractional order of rational Chebyshev orthogonal functions (FRCS) of the first kind, FTn alpha (t, L), on a semi-infinite domain, where L is an arbitrary numerical parameter. First, using the quasilinearization method, the equation be converted into a sequence of linear ordinary differential equations (LDEs), and then these LDEs are solved using the FRCS collocation method. Using 300 collocation points, we have obtained a very good approximation solution and the value of the initial slope y'(0) = -1.5880710226113753127186845094239501095, highly accurate to 37 decimal places.

• 出版日期2017-6