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Cosmos Experiments 2: Exploring the Parameter Space

The previous chapter described the results of a single Cosmos run. In the present chapter we will first investigate the extent to which the differences in behaviour between a number of runs are due purely to the stochastic nature of the system (Section 6.1). This gives us an idea of how many times we should run each experiment, keeping all parameter values constant, to see a range of different behaviours arising solely through this stochasticity. With this in mind, the results of a collection of further experiments are then described, which were designed to explore the parameter space of the system somewhat. For all of the experiments reported, any non-default parameter settings are listed; most are specified in the relevant sections of this chapter, but the values of the parameter rng_seed, used to seed the random number generator for each of the runs, are listed separately in Section B.5.


Tim Taylor