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幂定律或称幂法则(英语:Power law)是一种多项式关系。遵守这关系的多项式,会展现出标度不变性英语scale invariance的性质。最普通的,表达两个变量之间关系的幂定律,其形式为

其中,都是常数,的一个渐近微小函数

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幂律函数的例子

参见

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