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Existence of nonlinear Lane-Emden equation offractional order

2012; Volume: 13; Issue: 1 Linguagem: Inglês

10.18514/mmn.2012.453

1787-2413

Rabha W. Ibrahim,

Nonlinear Waves and Solitons

We study a Dirichlet boundary value problem for the Lane-Emden equation involving two fractional orders.Lane-Emden equation has been widely used to describe a variety of phenomena in physics and astrophysics, including aspects of stellar structure, the thermal history of a spherical cloud of gas, isothermal gas spheres, and thermionic currents.However, ordinary Lane-Emden equation does not provide a correct description of the dynamics of systems in complex media.In order to overcome this problem and describe dynamical processes in a fractal medium, numerous generalizations of Lane-Emden equation have been proposed.One such generalization replaces the ordinary derivative by a fractional derivative in the Lane-Emden equation.This gives rise to the fractional Lane-Emden equation with a single index.Recently, a new type of Lane-Emden equation with two different fractional orders has been introduced which provides a more flexible model for fractal processes as compared with the usual one characterized by a single index.The contraction mapping principle and Krasnoselskii's fixed point theorem are applied to prove the existence of solutions of the problem in a Banach space.