... Bohner and A. Peterson, Dynamic Equations on Time Scales: An Introduction with Applications,Birkh¨auser, Boston, Mass, USA, 2001.3 M. Bohner and A. Peterson, Eds., Advances in Dynamic Equations ... L. Erbe, A. Peterson, and R. Mathsen, “Existence, multiplicity, and nonexistence of positive solutionsto a differential equation on a measure chain,” Journal of Computational and Applied Mathematics,vol.113, ... dynamicequation besides a barrier strips condition. The main tool in this paper is the induction principle on time scales.1. IntroductionCalculus on time scales, which unify continuous and discrete...