| Based on the discussion in [6] of projected Gronwall inequality u(t)≤ a(t)＋∫0tb(t-s)u(s)ds＋∫0∞c(s)u(t＋s)ds,?t≥ 0,it is indicated that the condition that (?) a(t) = 0 in [6] is not necessary. Futhermore,with-out continuity of functions u(t), a(t), and c(t), and monotonicity of function a(t),a moregeneral result is obtained. This result can be properly used in the case of [5],and the newmethod of the proof can remedy the leak in [5]. |
