An unconditionally positive and global stability preserving NSFD scheme for an epidemic model with vaccination
, and | Sep 25, 2014
International Journal of Applied Mathematics and Computer Science
Modelling and Simulation of High Performance Information Systems (special section, pp. 453-566), Pavel Abaev, Rostislav Razumchik, Joanna Kołodziej (Eds.)
Published Online: Sep 25, 2014
Page range: 635 - 646
Received: May 31, 2013
DOI: https://doi.org/10.2478/amcs-2014-0046
Keywords
© by Deqiong Ding
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
In this paper, a NonStandard Finite Difference (NSFD) scheme is constructed, which can be used to determine numerical solutions for an epidemic model with vaccination. Here the NSFD method is employed to derive a set of difference equations for the epidemic model with vaccination. We show that difference equations have the same dynamics as the original differential system, such as the positivity of the solutions and the stability of the equilibria, without being restricted by the time step. Our proof of global stability utilizes the method of Lyapunov functions. Numerical simulation illustrates the effectiveness of our results