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process, as well as most of the events in the simulation, is
stochastic, that is, a given probability is assigned to the event
such that its actual realisation is decided by random numbers,
which is equivalent to fl ipping a coin (to simulate an event with
probability p, a random number between 0 and 1 is generated; if
this number turns out to be lower than p the event takes place,
otherwise it doesn’t; this is called a Bernoulli trial). Thus, the
probability for a stimulated B-cell to start the mitosis cycle is
given by the following probability:
Pr[B divides] = F
1
(n(x, t))
where n(x, t) is the total number of cells (of all types) in site ...