The object of this paper is to present a computable solution of a fractional
partial differential equation associated with a Riemann-Liouville derivative of
fractional order as the time-derivative and Riesz-Feller fractional derivative
as the space derivative. The method followed in deriving the solution is that
of joint Laplace and Fourier transforms. The solution is derived in a closed
and computable form in terms of the H-function. It provides an elegant
extension of the results given earlier by Debnath, Chen et al., Haubold et al.,
Mainardi et al., Saxena et al., and Pagnini et al.
In view of the role of reaction equations in physical problems, the authors
derive the explicit solution of a fractional reaction equation of general
character, that unifies and extends earlier results. Further, an alternative
shorter method based on a result developed by the authors is given to derive
the solution of a fractional diffusion equation. Fox functions and
Mittag-Leffler functions are used for closed-form representations of the
solutions of the respective differential equations.
Here an extended form of the reaction rate probability integral, in the case
of nonresonant thermonuclear reactions with the depleted tail and the right
tail cut off, is considered. The reaction rate integral then can be looked upon
as the inverse of the convolution of the Mellin transforms of Tsallis type
statistics of nonextensive statistical mechanics and stretched exponential as
well as that of superstatistics and stretched exponentials. The differential
equations satisfied by the extended probability integrals are derived.
An alternative method for solving the fractional kinetic equations solved
earlier by Haubold and Mathai (2000) and Saxena et al. (2002, 2004a, 2004b) is
recently given by Saxena and Kalla (2007). This method can also be applied in
solving more general fractional kinetic equations than the ones solved by the
aforesaid authors.
Motivated essentially by the success of the applications of the
Mittag-Leffler functions in many areas of science and engineering, the authors
present in a unified manner, a detailed account or rather a brief survey of the
Mittag- Leffler function, generalized Mittag-Leffler functions, Mittag-Leffler
type functions, and their interesting and useful properties. Applications of
Mittag-Leffler functions in certain areas of physical and applied sciences are
also demonstrated.
Motivated essentially by the success of the applications of the
Mittag-Leffler functions in many areas of science and engineering, the authors
present in a unified manner, a detailed account or rather a brief survey of the
Mittag- Leffler function, generalized Mittag-Leffler functions, Mittag-Leffler
type functions, and their interesting and useful properties. Applications of
Mittag-Leffler functions in certain areas of physical and applied sciences are
also demonstrated.