X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.mli;h=0146dba2c6865ef1c60b7930d9d84fe1b5aa234a;hb=8b1a49bbee9eea86eb74c040defe701370ca5893;hp=89d6993d908ada394458ce40d97f86a0f061bc60;hpb=a872dba2b03e27967d5b9b51e950e85967340e52;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/terms.mli b/helm/software/components/ng_paramodulation/terms.mli
index 89d6993d9..0146dba2c 100644
--- a/helm/software/components/ng_paramodulation/terms.mli
+++ b/helm/software/components/ng_paramodulation/terms.mli
@@ -18,7 +18,7 @@ type 'a foterm =
 
 type 'a substitution = (int * 'a foterm) list
 
-type comparison = Lt | Eq | Gt | Incomparable
+type comparison = Lt | Eq | Gt | Incomparable | Invertible
 
 type rule = Superposition | Demodulation
 
@@ -52,10 +52,12 @@ type 'a unit_clause =
 
 type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
 
+val vars_of_term : 'a foterm -> int list
+
 module M : Map.S with type key = int 
 
 type 'a bag = int (* max ID  *)
-              * (('a unit_clause * bool) M.t)
+              * (('a unit_clause * bool * int) M.t)
 
 (* also gives a fresh ID to the clause *)
     val add_to_bag : 
@@ -63,11 +65,11 @@ type 'a bag = int (* max ID  *)
             'a bag * 'a unit_clause
 
     val replace_in_bag : 
-          'a unit_clause * bool -> 'a bag ->
+          'a unit_clause * bool * int -> 'a bag ->
             'a bag
 
     val get_from_bag : 
-          int -> 'a bag -> 'a unit_clause * bool
+          int -> 'a bag -> 'a unit_clause * bool * int
 
     val empty_bag : 'a bag