Exploring the Dynamics of Mass Action Systems

Mass action is a fundamental notion in many situations in Chemistry, Biochemistry, Population Dy-namics and Social Systems [1]. In this class of phenomena, one has a large population of individualspartitioned into several types of “species”, whose dynamics is specified by a set of reaction rules. Eachreaction indicates the transformation that is likely to take place when individuals of specific types comeinto contact. For example, a rule of the form A+B ! A+C says that each time an instance of Ameets an instance of B, the latter is transformed into aC. Denoting by n