1School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 2Center for High Energy Physics, Peking University, Beijing 100871
Abstract：The first digit law, also known as Benford's law or the significant digit law, is an empirical phenomenon that the leading digit of numbers from real world sources favors small ones in a form $\log(1+{1}/{d})$, where $d=1, 2,\ldots, 9$. Such a law has been elusive for over 100 years because it has been obscure whether this law is due to the logical consequence of the number system or some mysterious mechanism of nature. We provide a simple and elegant proof of this law from the application of the Laplace transform, which is an important tool of mathematical methods in physics. It is revealed that the first digit law originates from the basic property of the number system, thus it should be attributed as a basic mathematical knowledge for wide applications.
. [J]. 中国物理快报, 2019, 36(7): 70201-.
Mingshu Cong, Bo-Qiang Ma. A Proof of First Digit Law from Laplace Transform. Chin. Phys. Lett., 2019, 36(7): 70201-.
2019, Vol. 36 
