Solution of fractional differential equations using variational approach.

The main theme of this thesis is oriented toward three objectives. The first objectives, is to study and illustrate the basic properties of fractional calculus such as differentiation and integration. The second objective is a study of fractional differential equations of the form: y(a) = f(x, y), y(a-k)(x0) = y0, k = 1, 2,...n+l, n