Two Efficient Generalized Laguerre Spectral Algorithms for Fractional Initial Value Problems

• Published in: Abstract and Applied Analysis Vol. 2013; no. 2013; pp. 754 - 763-685
• Main Authors: Baleanu, Dumitru, Bhrawy, Ali H., Taha, T. M.
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Limiteds 01.01.2013; Hindawi Puplishing Corporation; Hindawi Publishing Corporation; John Wiley & Sons, Inc; Wiley
• Subjects: Algorithms; Applied mathematics; Approximation; Boundary value problems; Derivatives; Heuristic; Initial conditions; Intervals; Laguerre polynomials; Mathematical analysis; Mathematical research; Mathematics; Methods; Nonlinearity; Polynomials; Science; Spectra; Studies; Saudi Arabia
• ISSN: 1085-3375; 1687-0409
• DOI: 10.1155/2013/546502

We present a direct solution technique for approximating linear multiterm fractional differential equations (FDEs) on semi-infinite interval, using generalized Laguerre polynomials. We derive the operational matrix of Caputo fractional derivative of the generalized Laguerre polynomials which is applied together with generalized Laguerre tau approximation for implementing a spectral solution of linear multiterm FDEs on semi-infinite interval subject to initial conditions. The generalized Laguerre pseudo-spectral approximation based on the generalized Laguerre operational matrix is investigated to reduce the nonlinear multiterm FDEs and its initial conditions to nonlinear algebraic system, thus greatly simplifying the problem. Through several numerical examples, we confirm the accuracy and performance of the proposed spectral algorithms. Indeed, the methods yield accurate results, and the exact solutions are achieved for some tested problems.