You're reading the public-facing archive of the Category Theory Zulip server.
To join the server you need an invite. Anybody can get an invite by contacting Matteo Capucci at name dot surname at gmail dot com.
For all things related to this archive refer to the same person.
I've been tweeting for months teaching people statistical mechanics, leading up to a derivation of the Sackur-Tetrode formula for the entropy of an ideal gas.
This is a nice article about its history:
It's nice - and by the way, @Owen Lynch, it states the equation in a way that's much more pleasant to read than the way you used to write it.