We study ordinary
differential equations of the type u(n)(t) = f(u(t)), with initial conditions
u(0) = u′(0) =⋯= u(m−1)(0) = 0 and u(m)(0)≠0, where m ≥ n; no additional
assumption is made on f. We establish some uniqueness results and show that f is
always Hölder continuous.
Keywords
uniqueness of solutions, ordinary differential equations