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A concise proof of Benford's law.

Luohan Wang1, Bo-Qiang Ma1,2,3

  • 1School of Physics, Peking University, Beijing 100871, China.

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This study offers a simple proof for Benford's Law, showing it arises from our number system. A new criterion helps determine if data follows this law, aiding fraud detection.

Keywords:
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Area of Science:

  • Mathematics
  • Statistics
  • Data Science

Background:

  • Benford's Law describes the common occurrence of lower digits in numerical datasets.
  • Existing proofs can be complex and inaccessible to a wider audience.
  • A practical method to verify adherence to Benford's Law is needed, particularly for data integrity.

Purpose of the Study:

  • To present an intuitive and concise proof of Benford's Law.
  • To develop a criterion for assessing whether a distribution conforms to Benford's Law.
  • To demonstrate the law's origin in fundamental properties of the human number system.

Main Methods:

  • The study employs a proof based on Riemann integrable probability density functions.
  • A novel criterion is introduced to evaluate data distribution against Benford's Law.
  • The mathematical derivation is designed for accessibility to those with basic calculus knowledge.

Main Results:

  • A straightforward and elegant proof of Benford's Law is provided.
  • The criterion effectively determines if a distribution adheres to Benford's Law.
  • The law's foundation is linked to the inherent characteristics of numerical representation.

Conclusions:

  • The presented proof simplifies understanding of Benford's Law.
  • The new criterion offers a convenient tool for data analysis and validation.
  • This work has significant implications for fraud detection and data integrity checks.