r/theoreticalcs

I already asked this on r/learnprogramming but I didn't get any response:

In the intro to the book, they say there is auxiliary material related to automata and computability theory. The link provided is https://www.cs.princeton.edu/theory/complexity/ but there's no material there that I see. Hopefully it just moved, but I'd really like to find it.

This is an incredible field, why so few posts? Maybe I will start posting. I am a graduate math student so I dont have expertise on this subject, but I hope this sub gets more attention.

Its suprising to me for a field I find much more interesting than theoretical physics.