Definitions for

**"Complexity Theory"**The theory that processes with a large number of seemingly independent agents can spontaneously organize themselves into a coherent system.

level: Comprehensive (3) [ order by level] A more general theory of complexity (compared to chaos), which studies the relationships between the number of parts making up a system (e.g., an airport, or a living organism) and the complexity of its behavior.

The mathematical study of the difficulty of solving any well-stated problem in terms of resources (time and space) consumed. Complexity theory is used primarily to determine the effect of an increase in the size of a problem.

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