Abstract and Applied Analysis
Volume 2010 (2010), Article ID 234015, 26 pages
Research Article

Boundary Value Problems for Systems of Second-Order Dynamic Equations on Time Scales with Δ -Carathéodory Functions

1Département de Mathématiques et de Statistique, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada
2Département de Mathématiques, Collège Édouard-Montpetit, 945 Chemin de Chambly, Longueuil, QC, J4H 3M6, Canada

Received 31 August 2010; Accepted 30 November 2010

Academic Editor: J. Mawhin

Copyright © 2010 M. Frigon and H. Gilbert. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We establish the existence of solutions to systems of second-order dynamic equations on time scales with the right member 𝑓 , a Δ -Carathéodory function. First, we consider the case where the nonlinearity 𝑓 does not depend on the Δ -derivative, 𝑥 Δ ( 𝑡 ). We obtain existence results for Strum-Liouville and for periodic boundary conditions. Finally, we consider more general systems in which the nonlinearity 𝑓 depends on the Δ -derivative and satisfies a linear growth condition with respect to 𝑥 Δ ( 𝑡 ). Our existence results rely on notions of solution-tube that are introduced in this paper.