And you can take sets as something built on top of categories (specifically, topoi), so category theory is more foundational than set theory. http://plato.stan

And you can take sets as something built on top of categories (specifically, topoi), so category theory is more foundational than set theory. http://plato.stanford.edu/entries/category-theory/ http://plato.stanford.edu/entries/category-theory/ http://sakharov.net/foundation.html http://sakharov.net/foundation.html http://en.wikipedia.org/wiki/Topos http://en.wikipedia.org/wiki/Topos