Cosma Shalizi has a brief paper in the arxiv:(adsbygoogle = window.adsbygoogle || []).push({});

http://www.arxiv.org/PS_cache/cond-mat/pdf/0410/0410063.pdf [Broken]

containing a proof that if you use Bayesian degree of belief oriented probability in forming statistical mechanics a la Jaynes, entropy comes out non-increasing; the arrow of time points backwards! Even if you replace full Bayesian statistics with the maximum entropy formalism, the result still holds. It looks like Shalizi himself is stunned by the result; he has noted on the paper "Comments unusually welcome".

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Bayesian Stat Mech reverses Entropy?

**Physics Forums | Science Articles, Homework Help, Discussion**