Power law with probability density function

In statistics, a power law is a functional dependence between two quantities in which a relative change in one quantity leads to a proportional relative change in another quantity, regardless of the initial values of these quantities: the dependence of one quantity on another is a power function. For example, consider the dependence of the area of a square on the length of its side. If the length is doubled, then the area will increase fourfold.


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