Positive Systems: Proceedings of the third Multidisciplinary International Symposium on Positive Systems

This volume contains the proceedings of the "Third Multidisciplinary Symposium on Positive Systems: Theory and Applications (POSTA09)" held in Valencia, Spain, September 2–4, 2009. At present, this is the only world congress whose main topic is focused on this field. After this third event, the basis of a regular triennial event supported in the task of the previous organizing committees has become established.