I would say that set theory is the language in which we choose to talk about combinatorics. There may in fact be good reasons why it's the standard choice. But saying that combinatorics is about set theory is like saying that sociology is about English.
OTOH, I sometimes defend the view that *everything* is about combinatorics.
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krja
(no subject)
Date: 2006-11-19 06:27 am (UTC)OTOH, I sometimes defend the view that *everything* is about combinatorics.