Editorial: Qualitative analysis of differential equations (Q2247839)

Summary: It is our pleasure to provide this special issue on qualitative analysis of differential equations in International Journal of Differential Equations. Qualitative analysis has proved to be an important and useful tool to investigate the properties of solutions of differential equations, because it enables to analyze differential equations without solving analytically and numerically. The study of qualitative properties of differential equations has a long history, and qualitative theories have been developed for various equations such as ordinary differential equations, functional differential equations, abstract differential equations, dynamical systems, integral equations, difference equations, partial differential equations, functional partial differential equations and so forth. Since the qualitative analysis of differential equations is related to both pure and applied mathematics, its applications to various fields such as science, engineering, and ecology have been extensively developed.