Reaction systems were introduced as a formal model of interactions between biochemical reactions. These interactions, which are based on two mechanisms: facilitation and inhibition, determine the functioning of the living cell. Processes taking place in a reaction system   A     A        are driven by the fixed set  A    of available reactions provided by   A     A       . In this paper we generalize this setup: as a process progresses from a state  W    to its successor   W ′        W    ′         , the set of available reactions may change from  A  in  W    to   A ′        A    ′          in   W ′        W    ′         . This new framework of  evolving reaction systems  is introduced and studied in this paper. Also, the notion of enabling equivalence between sets of reactions and the notion of a transformation of a set of reactions are introduced and thoroughly studied.
['Andrzej Ehrenfeucht', 'Jetty Kleijn', 'Maciej Koutny', 'Grzegorz Rozenberg']
Evolving Reaction Systems