TURKISH JOURNAL OF MATHEMATICS, cilt.32, sa.3, ss.255-275, 2008 (SCI-Expanded)
In this study, we prove Lyapunov-type inequalities for certain nonlinear systems on an arbitrary time scale T by using elementary time scale calculus. These inequalities enable us to obtain a criterion of disconjugacy for such systems. Special cases of our results contain the classical Lyapunov inequality for both differential and difference equations.