Original: After Bernoulli and Poisson published their efforts , other mathematicians also contributed to refinement of the law , including Chebyshev , Markov , Borel , Cantelli and Kolmogorov and Khinchin ( who finally provided a complete proof of the LLN for the arbitrary random variables ) .
Simplified: Other mathematicians also contributed to make the law better . Some of them were Chebyshev , Markov , Borel , Cantelli and Kolmogorov .