Issue
4open
Volume 2, 2019
Difference & Differential Equations and Applications
Article Number 26
Number of page(s) 12
Section Mathematics - Applied Mathematics
DOI https://doi.org/10.1051/fopen/2019015
Published online 11 July 2019

© Q. Wang & Y. Liu, Published by EDP Sciences, 2019

Licence Creative CommonsThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.