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diff --git a/matita/components/cic_unification/cicMkImplicit.ml b/matita/components/cic_unification/cicMkImplicit.ml
deleted file mode 100644
index 36679223c..000000000
--- a/matita/components/cic_unification/cicMkImplicit.ml
+++ /dev/null
@@ -1,122 +0,0 @@
-(* Copyright (C) 2004, HELM Team.
- * 
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- * 
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * 
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA  02111-1307, USA.
- * 
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-(* $Id$ *)
-
-(* identity_relocation_list_for_metavariable i canonical_context         *)
-(* returns the identity relocation list, which is the list [1 ; ... ; n] *)
-(* where n = List.length [canonical_context]                             *)
-(*CSC: ma mi basta la lunghezza del contesto canonico!!!*)
-let identity_relocation_list_for_metavariable ?(start = 1) canonical_context =
-  let rec aux =
-   function
-      (_,[]) -> []
-    | (n,None::tl) -> None::(aux ((n+1),tl))
-    | (n,_::tl) -> (Some (Cic.Rel n))::(aux ((n+1),tl))
-  in
-   aux (start,canonical_context)
-
-(* Returns the first meta whose number is above the *)
-(* number of the higher meta.                       *)
-let new_meta metasenv subst =
-  let rec aux =
-   function
-      None, [] -> 1
-    | Some n, [] -> n
-    | None, n::tl -> aux (Some n,tl)
-    | Some m, n::tl -> if n > m then aux (Some n,tl) else aux (Some m,tl)
-  in
-  let indexes = 
-    (List.map (fun (i, _, _) -> i) metasenv) @ (List.map fst subst)
-  in
-  1 + aux (None, indexes)
-
-(* let apply_subst_context = CicMetaSubst.apply_subst_context;; *)
-(* questa o la precedente sembrano essere equivalenti come tempi *)
-let apply_subst_context _ context = context ;;
-
-let mk_implicit metasenv subst context =
-  let newmeta = new_meta metasenv subst in
-  let newuniv = CicUniv.fresh () in
-  let irl = identity_relocation_list_for_metavariable context in
-    (* in the following mk_* functions we apply substitution to canonical
-    * context since we have the invariant that the metasenv has already been
-    * instantiated with subst *)
-  let context = apply_subst_context subst context in
-  ([ newmeta, [], Cic.Sort (Cic.Type newuniv) ;
-    (* TASSI: ?? *)
-    newmeta + 1, context, Cic.Meta (newmeta, []);
-    newmeta + 2, context, Cic.Meta (newmeta + 1,irl) ] @ metasenv,
-   newmeta + 2)
-
-let mk_implicit_type metasenv subst context =
-  let newmeta = new_meta metasenv subst in
-  let newuniv = CicUniv.fresh () in
-  let context = apply_subst_context subst context in
-  ([ newmeta, [], Cic.Sort (Cic.Type newuniv);
-    (* TASSI: ?? *)
-    newmeta + 1, context, Cic.Meta (newmeta, []) ] @metasenv,
-   newmeta + 1)
-
-let mk_implicit_sort metasenv subst =
-  let newmeta = new_meta metasenv subst in
-  let newuniv = CicUniv.fresh () in
-  ([ newmeta, [], Cic.Sort (Cic.Type newuniv)] @ metasenv, newmeta)
-  (* TASSI: ?? *)
-
-let n_fresh_metas metasenv subst context n = 
-  if n = 0 then metasenv, []
-  else 
-    let irl = identity_relocation_list_for_metavariable context in
-    let context = apply_subst_context subst context in
-    let newmeta = new_meta metasenv subst in
-    let newuniv = CicUniv.fresh () in
-    let rec aux newmeta n = 
-      if n = 0 then metasenv, [] 
-      else
-        let metasenv', l = aux (newmeta + 3) (n-1) in 
-	(* TASSI: ?? *)
-        (newmeta, context, Cic.Sort (Cic.Type newuniv))::
-        (newmeta + 1, context, Cic.Meta (newmeta, irl))::
-        (newmeta + 2, context, Cic.Meta (newmeta + 1,irl))::metasenv',
-        Cic.Meta(newmeta+2,irl)::l in
-    aux newmeta n
-      
-let fresh_subst metasenv subst context uris = 
-  let irl = identity_relocation_list_for_metavariable context in
-  let context = apply_subst_context subst context in
-  let newmeta = new_meta metasenv subst in
-  let newuniv = CicUniv.fresh () in
-  let rec aux newmeta = function
-      [] -> metasenv, [] 
-    | uri::tl ->
-       let metasenv', l = aux (newmeta + 3) tl in 
-         (* TASSI: ?? *)
-	 (newmeta, context, Cic.Sort (Cic.Type newuniv))::
-         (newmeta + 1, context, Cic.Meta (newmeta, irl))::
-         (newmeta + 2, context, Cic.Meta (newmeta + 1,irl))::metasenv',
-          (uri,Cic.Meta(newmeta+2,irl))::l in
-    aux newmeta uris
-