The first-order differential equation of exponential relaxation can be generalized by using either the fractional derivative in the Riemann–Liouville (R-L) sense and in the Caputo (C) sense, both of a single order less than 1. The two forms turn out to be equivalent. When, however, we use fractional derivatives of distributed order (between zero and 1), the equivalence is lost, in particular on...

This study, considers the fractional order cable model (FCM) in sense of Riemann–Liouville derivatives (R-LFD). We use a modified implicit finite difference approximation to solve FCM numerically. The Fourier series approach is used examine proposed scheme’s theoretical analysis, including stability and convergence. scheme shown be unconditionally stable, approximate solution converges exact so...

In this work, the fractional Lie symmetry method is used to find exact solutions of time-fractional coupled Drinfeld-Sokolov-Wilson equations with Riemann-Liouville derivative. Time-fractional are obtained by replacing first-order time derivative derivatives (FD) order $\alpha$ in classical (DSW) model. Using method, generators obtained. With help generators, FCDSW reduced into ordinary differe...

In this paper we prove exact forms of large deviations for local times and intersection local times of fractional Brownian motions and Riemann–Liouville processes. We also show that a fractional Brownian motion and the related Riemann–Liouville process behave like constant multiples of each other with regard to large deviations for their local and intersection local times. As a consequence of o...

In this paper, we first consider the general fractional derivatives of arbitrary order defined in Riemann–Liouville sense. particular, deduce an explicit form their null space and prove second fundamental theorem calculus that leads to a closed formula for projector operator. These results allow us formulate natural initial conditions differential equations with part develop operational Mikusi?...

A fractional generalization of variations is used to define a stability of non-integer order. Fractional variational derivatives are suggested to describe the properties of dynamical systems at fractional perturbations. We formulate stability with respect to motion changes at fractional changes of variables. Note that dynamical systems, which are unstable ”in sense of Lyapunov”, can be stable w...

In this study, the Lie symmetry analysis is given for time-fractional telegraph equation with Riemann–Liouville derivative. This useable to describe physical processes of models possessing memory. By applying classical and nonclassical α , β derivatives some technical computations, new infinitesimal gen...