This blog is an experiment in exposition. Over the years, I’ve often entertained the idea “really” reading through Shelah’s “Cardinal Arithmetic” and its various continuations in the literature, with an eye toward producing some sort of exposition that would make advanced pcf theory (and its applications) more accessible to people. Over the last few months, I’ve found that maintaining this blog has been extraordinarily helpful to me: the fact that what I write is publicly available provides motivation to keep going, and the limited scope of individual posts has been helpful in making me think hard about how to present material.


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