X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fformal_topology%2Fbin%2Ftheory_explorer.ml;h=82850e40d2581be9943818389e972d5aa561cf03;hb=7329247b6325d8890f13898c25e68255e843e498;hp=5d3098d019c05889e462aba658f150a021bb74d4;hpb=4fd0802f846c1c011c9d393747b11d2bbc582269;p=helm.git

diff --git a/helm/software/matita/contribs/formal_topology/bin/theory_explorer.ml b/helm/software/matita/contribs/formal_topology/bin/theory_explorer.ml
index 5d3098d01..82850e40d 100644
--- a/helm/software/matita/contribs/formal_topology/bin/theory_explorer.ml
+++ b/helm/software/matita/contribs/formal_topology/bin/theory_explorer.ml
@@ -36,6 +36,9 @@ type equivalence_class =
  compound_operator * compound_operator list *
   equivalence_class list ref * equivalence_class list ref
 
+let (===) (repr,_,_,_) (repr',_,_,_) = repr = repr';;
+let (<=>) (repr,_,_,_) (repr',_,_,_) = repr <> repr';;
+
 let string_of_equivalence_class (repr,others,leq,_) =
  String.concat " = " (List.map string_of_cop (repr::others)) ^
   (if !leq <> [] then
@@ -113,8 +116,9 @@ let ps_of_set (to_be_considered,under_consideration,news) ?processing (s,inf,sup
   output_string ch "}\n";
   close_out ch;
   (*ignore (Unix.system "tred xxx.dot > yyy.dot && dot -Tps yyy.dot > xxx.ps")*)
-  ignore (Unix.system "dot -Tps xxx.dot > xxx.ps");
-  ignore (read_line ())
+  ignore (Unix.system "cp xxx.ps xxx_old.ps && dot -Tps xxx.dot > xxx.ps");
+  (*ignore (read_line ())*)
+;;
 
 let test to_be_considered_and_now ((s,_,_) as set) rel candidate repr =
  ps_of_set to_be_considered_and_now ~processing:(candidate,rel,repr) set;
@@ -161,7 +165,7 @@ let test to_be_considered_and_now ((s,_,_) as set) rel candidate repr =
    print_endline (if res then "y" else "n");
    res
 
-let remove node = List.filter (fun node' -> node != node');;
+let remove node = List.filter (fun node' -> node <=> node');;
 
 let add_leq_arc ((_,_,leq,_) as node) ((_,_,_,geq') as node') =
  leq := node' :: !leq;
@@ -215,71 +219,79 @@ let geq_transitive_closure node node' =
   remove_transitive_arcs node node'
 ;;
 
-let (@@) l1 e = if List.memq e l1 then l1 else l1@[e]
+let (@@) l1 n = if List.exists (function n' -> n===n') l1 then l1 else l1@[n]
+
+let rec leq_reachable node =
+ function
+    [] -> false
+  | node'::_ when node === node' -> true
+  | (_,_,leq,_)::tl -> leq_reachable node (!leq@tl)
+;;
+
+let rec geq_reachable node =
+ function
+    [] -> false
+  | node'::_ when node === node' -> true
+  | (_,_,_,geq)::tl -> geq_reachable node (!geq@tl)
+;;
 
 let locate_using_leq to_be_considered_and_now ((repr,_,leq,_) as node)
- ((_,_,sup) as set)
+ set start
 =
- let rec aux is_sup ((nodes,inf,sup) as set) =
+ let rec aux ((nodes,inf,sup) as set) =
   function
-     [] ->
-      if is_sup then
-       nodes,inf,sup@@node
-      else
-       set
+     [] -> set
    | (repr',_,_,geq') as node' :: tl ->
-       if repr=repr' then aux is_sup set (!geq'@tl)
-       else if List.mem node' !leq
-            || test to_be_considered_and_now set SubsetEqual repr repr'
-       then
+       if repr=repr' then aux set (!geq'@tl)
+       else if leq_reachable node' !leq then
+        aux set tl
+       else if test to_be_considered_and_now set SubsetEqual repr repr' then
         begin
+         let sup = remove node sup in
          let inf = if !geq' = [] then (remove node' inf)@@node else inf in
           leq_transitive_closure node node';
-          aux false (nodes,inf,sup) (!geq'@tl)
+          aux (nodes,inf,sup) (!geq'@tl)
         end
        else
-        aux is_sup set tl
+        aux set tl
  in
-prerr_endline ("SUP: " ^ String.concat "," (List.map (fun (x,_,_,_) -> string_of_cop x) sup));
-  aux true set sup
+  aux set start
 ;;
 
 exception SameEquivalenceClass of equivalence_class * equivalence_class;;
 
 let locate_using_geq to_be_considered_and_now ((repr,_,leq,geq) as node)
- ((_,inf,_) as set)
+ set start
 =
- let rec aux is_inf ((nodes,inf,sup) as set) =
+ let rec aux ((nodes,inf,sup) as set) =
   function
-     [] ->
-      if is_inf then
-       nodes,inf@@node,sup
-      else
-       set
+     [] -> set
    | (repr',_,leq',_) as node' :: tl ->
-       if repr=repr' then aux is_inf set (!leq'@tl)
-       else if List.mem node' !geq
-            || test to_be_considered_and_now set SupersetEqual repr repr'
-       then
+       if repr=repr' then aux set (!leq'@tl)
+       else if geq_reachable node' !geq then
+        aux set tl
+       else if test to_be_considered_and_now set SupersetEqual repr repr' then
         begin
-         if List.mem node' !leq then
+         if List.exists (function n -> n===node') !leq then
           (* We have found two equal nodes! *)
           raise (SameEquivalenceClass (node,node'))
          else
           begin
+           let inf = remove node inf in
            let sup = if !leq' = [] then (remove node' sup)@@node else sup in
             geq_transitive_closure node node';
-            aux false (nodes,inf,sup) (!leq'@tl)
+            aux (nodes,inf,sup) (!leq'@tl)
           end
         end
        else
-        aux is_inf set tl
+        aux set tl
  in
-prerr_endline ("INF: " ^ String.concat "," (List.map (fun (x,_,_,_) -> string_of_cop x) inf));
-  aux true set inf
+  aux set start
 ;;
 
 let analyze_one to_be_considered repr hecandidate (news,((nodes,inf,sup) as set)) =
+if not (List.for_all (fun ((_,_,_,geq) as node) -> !geq = [] && let rec check_sups = function [] -> true | (_,_,leq,_) as node::tl -> if !leq = [] then List.exists (fun n -> n===node) sup && check_sups tl else check_sups (!leq@tl) in check_sups [node]) inf) then (ps_of_set ([],None,[]) set; assert false);
+if not (List.for_all (fun ((_,_,leq,_) as node) -> !leq = [] && let rec check_infs = function [] -> true | (_,_,_,geq) as node::tl -> if !geq = [] then List.exists (fun n -> n===node) inf && check_infs tl else check_infs (!geq@tl) in check_infs [node]) sup) then (ps_of_set ([],None,[]) set; assert false);
  let candidate = hecandidate::repr in
   if List.length (List.filter ((=) M) candidate) > 1 then
    news,set
@@ -289,22 +301,62 @@ let analyze_one to_be_considered repr hecandidate (news,((nodes,inf,sup) as set)
     let geq = ref [] in
     let node = candidate,[],leq,geq in
     let nodes = nodes@[node] in
-    let set = nodes,inf,sup in
-    let set = locate_using_leq (to_be_considered,Some repr,news) node set in
-    let set = locate_using_geq (to_be_considered,Some repr,news) node set in
+    let set = nodes,inf@[node],sup@[node] in
+    let start_inf,start_sup =
+     let repr_node =
+      match List.filter (fun (repr',_,_,_) -> repr=repr') nodes with
+         [node] -> node
+       | _ -> assert false
+     in
+inf,sup(*
+     match hecandidate with
+        I -> inf,[repr_node]
+      | C -> [repr_node],sup
+      | M -> inf,sup
+*)
+    in
+    let set =
+     locate_using_leq (to_be_considered,Some repr,news) node set start_sup in
+(
+let _,inf,sup = set in
+if not (List.for_all (fun ((_,_,_,geq) as node) -> !geq = [] && let rec check_sups = function [] -> true | (_,_,leq,_) as node::tl -> if !leq = [] then List.exists (fun n -> n===node) sup && check_sups tl else check_sups (!leq@tl) in check_sups [node]) inf) then (ps_of_set ([],None,[]) set; assert false);
+if not (List.for_all (fun ((_,_,leq,_) as node) -> !leq = [] && let rec check_infs = function [] -> true | (_,_,_,geq) as node::tl -> if !geq = [] then List.exists (fun n -> n===node) inf && check_infs tl else check_infs (!geq@tl) in check_infs [node]) sup) then (ps_of_set ([],None,[]) set; assert false);
+);
+    let set =
+     locate_using_geq (to_be_considered,Some repr,news) node set start_inf
+    in
+(
+let _,inf,sup = set in
+if not (List.for_all (fun ((_,_,_,geq) as node) -> !geq = [] && let rec check_sups = function [] -> true | (_,_,leq,_) as node::tl -> if !leq = [] then List.exists (fun n -> n===node) sup && check_sups tl else check_sups (!leq@tl) in check_sups [node]) inf) then (ps_of_set ([],None,[]) set; assert false);
+if not (List.for_all (fun ((_,_,leq,_) as node) -> !leq = [] && let rec check_infs = function [] -> true | (_,_,_,geq) as node::tl -> if !geq = [] then List.exists (fun n -> n===node) inf && check_infs tl else check_infs (!geq@tl) in check_infs [node]) sup) then (ps_of_set ([],None,[]) set; assert false);
+);
      news@[candidate],set
    with
-    SameEquivalenceClass (node_to_be_deleted,node') ->
+    SameEquivalenceClass ((_,_,leq_d,geq_d) as node_to_be_deleted,node') ->
      let rec clean =
       function
          [] -> []
        | (repr',others,leq,geq) as node::tl ->
-          leq := List.filter (function node -> node_to_be_deleted != node) !leq;
-          geq := List.filter (function node -> node_to_be_deleted != node) !geq;
-          if node==node' then
+          leq :=
+           List.fold_right
+            (fun node l ->
+              if node_to_be_deleted <=> node then
+               node::l
+              else
+               !leq_d@l
+            ) !leq [];
+          geq :=
+           List.fold_right
+            (fun node l ->
+              if node_to_be_deleted <=> node then
+               node::l
+              else
+               !geq_d@l
+            ) !geq [];
+          if node===node' then
            (repr',others@[candidate],leq,geq)::clean tl
           else
-           (repr',others,leq,geq)::clean tl
+           node::clean tl
      in
      let nodes = clean nodes in
       news,(nodes,inf,sup)