Jan Draessler
(2004)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
In the paper we consider the impulsive periodic boundary value problem with a general linear left hand side. The results are based on the topological degree theorems for the corresponding operator equation on a certain set that is established using properties of strict lower and upper functions of the boundary value problem.