In his book "Algebra", Serge Lang refers to the "category of sets", implying the uniqueness of such a category. Isn't this terminology somewhat imprecise? i.e., clearly the category cannot contain all sets (Russell's paradox), so exactly which sets does it contain? Any clarification would be appreciated.
-- -- Narsa Chelluri "A single death is a firstname.lastname@example.org tragedy; a million FTP: soho.ios.com/pub/users/narsac deaths is a statistic." WWW: http://soho.ios.com/~narsac -- Josef Stalin