Periodicity and global dynamics of an impulsive delay Lasota–Wazewska model

The periodicity of an impulsive delay Lasota–Wazewska model is discussed. Sufficient and necessary condition for the existence of a positive periodic solution is established. Sufficient conditions for its global attractivity are also obtained via the methods of Lyapunov function and comparison. © 2006 Elsevier Inc. All rights reserved