In 1946, Chung and Fuchs proved a theorem that provides a sufficient condition for the law of the iterated logarithm (LIL) to hold.
Assuming you're referring to the Chung's theorem related to the law of the iterated logarithm, I provide you with a brief overview. chung probability pdf
If you provide more information or clarify which Chung probability distribution or theorem (e.g., Chung-Fuchs, Chung-Lai, or Chung-Sobel) you are referring to, I may provide you a more accurate response and high-quality equations. In 1946, Chung and Fuchs proved a theorem