This paper is intended to assist the reader learn, or even better, teach a course in pcf theory. Pcf theory can be described as the journey from the function \beth - the second letter of the Hebrew alphabet - to the function \aleph, the first letter. For English speaking readers the fewer the Hebrew letters the better, of course; but during 1994-95 it seemed that for a group of 6 post doctoral students in Jerusalem learning pcf theory from Shelah required knowing all 22 Hebrew letters, for Shelah was lecturing in Hebrew.
This paper offers a less challenging alternative: learning pcf in a pretty relaxed pace, with all details provided in every proof, and in English.
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Date received: December 11, 1995.
Date published: May 5, 1996.