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Extended set theory

Extended set theory seems to be a very complicated mess simply to put tuples with column names on some sort of solid foundation. Why a structural set theory is not enough is unclear, although structural set theory certainly did not exist when Childs came up with his theory (some time in the 1970s).

June 9th, 2010 11:31 am 

for some useful links.

is also useful.

These might explain what is the actual point of extended set theory