%0 Journal Article %T Nonlinear first-order periodic boundary-value problems of impulsive dynamic equations on time scales %A Wen Guan %A Dun-Gang Li %A Shuang-Hong Ma %J Electronic Journal of Differential Equations %D 2012 %I Texas State University %X 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. %K Periodic boundary value problem %K positive solution %K fixed point %K time scale %K impulsive dynamic equation %U http://ejde.math.txstate.edu/Volumes/2012/198/abstr.html