幂法则 power law。斯蒂文斯（S．S．Stevens）针对费奇纳（G．T．Fechner）的古典心理物理学倡导一种新的心理物理学，针对前者的对数法则而主张建立幂法则。
麻省理工学院的研究表明股市崩溃的频率服从反向三次幂法则。
Research at the Massachusetts Institute of Technology shows evidence that the frequency of stock market crashes follow an inverse cubic power law.
对幂指函数的求导法则做了进一步推广，并给出了相应的求导举例。
This article gives a further development of the power exponent function and some related examples.
尺寸和复杂性之间的关系被分形或者逆幂尺度法则统治，大多数稳定的自然和人工系统都遵守这个规则。
This relationship between size and multiplicity is governed by the fractal or inverse-power scaling law, which is obeyed by the majority of stable natural and artificial systems.
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