\lambda f:(\forall n:nat. (\forall H:(le 0 n). (n=n))). (f 0 (le_n 0))
### (* METASENV after disambiguation  *)

### (* TERM after disambiguation      *)
[f:(n:nat)((le O n)->(eq nat n n))](f O (le_n O))
### (* TYPE_OF the disambiguated term *)
(f:(n:nat)((le O n)->(eq nat n n)))(eq nat O O)
### (* REDUCED disambiguated term     *)
[f:(n:nat)((le O n)->(eq nat n n))](f O (le_n O))