Electronic Journal of Differential Equations,
Vol. 2012 (2012), No. 198, pp. 1-8.

Title: Nonlinear first-order periodic boundary-value problems of impulsive
       dynamic equations on time scales
 
Authors: Wen Guan        (Lanzhou Univ. of Technology, Gansu, China)
         Dun-Gang Li     (Lanzhou Univ. of Technology, Gansu, China)
	 Shuang-Hong Ma  (Lanzhou Univ. of Technology, Gansu, China)

Abstract:
 By using the fixed point theorem in cones, in this paper, existence criteria
 for single and multiple positive solutions to a class of nonlinear
 first-order periodic boundary value problems of impulsive dynamic equations
 on time scales are obtained. An example is given to illustrate the main
 results in this article.

Submitted August 20, 2012. Published November 10, 2012.
Math Subject Classifications: 39A10, 34B15.
Key Words: Periodic boundary value problem; positive solution; 
           fixed point; time scale; impulsive dynamic equation.