Publications
On the nonexistence of free complete distributive lattices
Garcia, O. & Nelson, E.
Order, 1(4) 399-403 (1985) [pdf]
We prove that there is no free object over a countable set in the category of complete distributive lattices with homomorphisms preserving binary meets and arbitrary joins.
On the non-existence of free complete Boolean algebras
Hales, A. W.
Fundamentae Mathematica, 54() 45-66 (1964) [pdf]