X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.mli;h=93f106a4f1c9e8c8464a1582a13d6d0a4c79d6c8;hb=ce0e8e7fc59e6a1f7ed6038370bdc1de096cdc01;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..93f106a4f 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 +52,13 @@ type 'a unit_clause =
 
 type 'a passive_clause = int * 'a unit_clause (* weight * equation *)
 
+val is_eq_clause : 'a unit_clause -> bool
+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 +66,11 @@ 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
 
@@ -84,6 +87,7 @@ module type Blob =
     (* TODO: consider taking in input an imperative buffer for Format 
      *  val pp : Format.formatter -> t -> unit
      * *)
+    val is_eq : t foterm -> (t foterm * t foterm * t foterm) option
     val pp : t -> string
 
     type input