The Cauchy–Lorentz distribution, named after Augustin Cauchy and Hendrik Lorentz, is a continuous probability distribution. As a probability distribution, it is known as the Cauchy distribution, while among physicists, it is known as the Lorentz distribution, Lorentz(ian) function, or Breit–Wigner distribution.

柯西分布也叫作柯西-洛伦兹分布，它是以奥古斯丁·路易·柯西与亨德里克·洛伦兹名字命名的连续概率分布. 作为概率分布，通常叫作柯西分布，物理学家也将之称为洛伦兹分布或者Breit-Wigner分布。

from:

http://en.wikipedia.org/wiki/Cauchy_distribution

http://itl.nist.gov/div898/handbook/eda/section3/eda3663.htm

http://mathworld.wolfram.com/CauchyDistribution.html

http://zh.wikipedia.org/wiki/%E6%9F%AF%E8%A5%BF%E5%88%86%E5%B8%83

http://baike.baidu.com/view/998454.htm