1.1 --- a/src/HOL/Library/Countable.thy	Wed Apr 09 05:30:14 2008 +0200
     1.2 +++ b/src/HOL/Library/Countable.thy	Wed Apr 09 05:31:04 2008 +0200
     1.3 @@ -24,7 +24,7 @@
     1.4  qed
     1.5  
     1.6  
     1.7 -subsection {* Converion functions *}
     1.8 +subsection {* Conversion functions *}
     1.9  
    1.10  definition to_nat :: "'a\<Colon>countable \<Rightarrow> nat" where
    1.11    "to_nat = (SOME f. inj f)"