In this paper, under some suitable conditions, we establish a general comparison theorem for positive solution of the following initial value problems: (p(1)(r)g(u(r))phi (u ' (r)))' + q(1)(r)f (u(r)) = 0, r > 0, u(0) = u(0), u ' (0) = 0, and (p(2)(r)g(v(
