In the stochastic model, \\(t\\) is still a continuous parameter, but the state S[t] makes little "jumps" at random times, when one of the reactions randomly "fires." Every time the dimerization reaction fires, the count of monomers goes down by two, and the count of dimers goes up by one. When the opposite reaction viz. dissociation fires, the dimer count goes down by one and the monomer count goes up by two.