模1的中心极限定理与乘积的Benford定律
The Modulo 1 Central Limit Theorem and Benford's Law for Products
摘要:
给出了M个独立连续随机变量模1之和收敛于L^1([0,1])中的均匀分布的充要条件,并讨论了推广到离散随机变量的结果.结果是,如果X_1,...,X_M是独立的连续随机变量,密度为f_1,.,f_M,对于任意基B为M,\to \infty,对于密度的多种选择,X_1 *. * X_M收敛于Benford定律基B。收敛速率可以用密度的傅里叶系数来量化,并为许多不同系统中本福德行为的流行提供了解释。
英文摘要:
We derive a necessary and sufficient condition for the sum of M independent continuous random variables modulo 1 to converge to the uniform distribution in L^1([0,1]), and discuss generalizations to discrete random variables. A consequence is that if X_1, ..., X_M are independent continuous random variables with densities f_1, ..., f_M, for any base B as M \to \infty for many choices of the densities the distribution of the digits of X_1 * ... * X_M converges to Benford's law base B. The rate of convergence can be quantified in terms of the Fourier coefficients of the densities, and provides an explanation for the prevalence of Benford behavior in many diverse systems.
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