October 20, 2011 at 12:32 | Posted in Uncategorized | Leave a comment

I’m still trying to figure out if the stuff I’ve gotten is new or not. I was certainly right about there being an error in the proof of Claim 3.5 on page 381 — Shelah points out in [Sh:513] “Pcf and infinite free subsets of an algebra” that the proof is incorrect, and only establishes something much weaker. But I have no idea if he’s rescued the result somewhere else in his collected works. I’ve emailed him; we’ll see what he says.

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