Existence of periodic solutions of \((2n+1)\)th-order ordinary differential equations.
The paper deals with the problem of the existence of a periodic solution for a class of odd-order nonlinear ordinary differential equations. It is always assumed that the function in the right-hand side of the system is continuous and periodic. An existence theorem for periodic solutions of the considered system is obtained without assuming smoothness.
scientific article; zbMATH DE number 2138648