For what classes of ODEs, describing dynamical systems, does the Lyapunov’s second method formulated in the classical and canonically generalized forms define the necessary and sufficient conditions for the (asymptotical) stability of motion?αβγδεζηθικλμνξοπ
ODEs stand for Ordinary differential equations?You can find most notes about differential equation in the following site.
http://faculty.atu.edu/mfinan/nnotes.html
I am studying basic introduction to differential equation,but I don't like the way of my book's authors introduce sicence and enginerring at the same time.If you study science and enginerring first,then study math,then you may understand the derivations easier.