You want something like this:
theory embedding
imports Nat_ZF
begin
locale embedding =
fixes big and small and embed
assumes is_inj: "embded \<in> inj(small, big)"
lemma mylemma: shows "1 = 1" by simp;
end
--- On Fri, 3/6/09, Victor Porton <
por...@narod.ru> wrote: