Topics include methods of solutions for linear and non-linear first order differential equations, linear second order differential equations, higher order linear differential equations, systems of ...

Non-linear physics is the study of systems where the output is not directly proportional to the input. Unlike linear systems, which follow simple, predictable relationships, non-linear systems exhibit ...

George D. Birkhoff, Rudolph E. Langer, The Boundary Problems and Developments Associated with a System of Ordinary Linear Differential Equations of the First Order, Proceedings of the American Academy ...