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FIGURE 2—— Complexity as a function of scale.

Note. Schematic illustration of complexity C(k) (vertical axis) as a function of scale, k (horizontal axis). A system with the highest possible fine-scale complexity corresponds to a system with independent parts (curve a). When all parts act together, the system has the largest-scale behavior but the same low value of complexity at all scales (curve b). Complex systems have various possible scales of behavior, as illustrated by one example (curve c).