The fractional calculus deals with the generalization of integration and differentiation of integer order to those ones of any order
. The
q-fractional differential equation usually describe the physical process imposed on the time scale set
Tq. In this paper, we first propose a difference formula for discretizing the fractional
q-derivative

of Caputo type with order

and scale index

. We establish a rigorous truncation error boundness and prove that this difference formula is unconditionally stable. Then, we consider the difference method for solving the initial problem of
q-fractional differential equation:

. We prove the unique existence and stability of the difference solution and give the convergence analysis. Numerical experiments show the effectiveness and high accuracy of the proposed difference method.
Type of Study:
Original Manuscript |
Subject:
Mat Received: 2019/12/18 | Revised: 2023/06/18 | Accepted: 2020/12/22 | Published: 2022/12/20 | ePublished: 2022/12/20