I haven’t gotten a chance to continue writing up the stuff from Sh506 recently, primarily because I’ve been working on a paper. On the bright side, much of the stuff from Sh506 that I wanted to talk about ended up in the paper.
So the paper should (hopefully) end up on the arXiv some time soon. In the mean time, I’ll separate off the pcf-theoretic stuff and compile it into its own note which I’ll post on this blog. That will also give me some opportunity to use the material there as a jumping off point to prove some small things that come from the machinery in Sh506.