+A **power law** describes a functional relationship where one quantity varies as a power of another, meaning a relative change in one causes a proportional relative change in the other, regardless of initial size. This ubiquitous mathematical pattern reveals a fundamental, often emergent, structure in diverse systems, from [word frequencies](/wiki/Word_Frequency) to [scale-free networks](/wiki/Scale-Free_Network), often implying a lack of characteristic scale.
+## See also
+- [Heavy Tail](/wiki/Heavy_Tail)
+- [Pareto Distribution](/wiki/Pareto_Distribution)
+- [Fractal](/wiki/Fractal)
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