I'm curious what you are trying to model that requires 10^15 agents. I just typed this number into WolframAlpha and got:
~~ 50 x the number of red blood cells in the human body (~~ 2x10^13) ... in other words the number of red blood cells in the FRIAM mailing list (give or take). Coincidence? Or perhaps Stephen has some some sinister motive.... -- Robert
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