Hello, I have a department elective course called "Differential equations theory" but I have no idea if it is going to be useful for me as a physicist (I'm interested in the theory/ minor math). The description of the course is as follows : The fundamental theorem of existence and autism, linear differential equations, systems of differential equations, self-system, and change parameters. Solutions volatile, functions characteristics, stability theory, the theory of Abanov. I tried to search the web, but I didn't find that much of info about the included description. Can you help me on the level of the course and if its useful ?