--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Sequents/S4.ML	Wed Oct 09 13:32:33 1996 +0200
@@ -0,0 +1,17 @@
+(*  Title:      Modal/S4
+    ID:         $Id$
+    Author:     Martin Coen
+    Copyright   1991  University of Cambridge
+*)
+
+local open Modal0_rls S4
+in structure MP_Rule : MODAL_PROVER_RULE =
+   struct
+    val rewrite_rls = rewrite_rls
+    val safe_rls    = safe_rls
+    val unsafe_rls  = unsafe_rls @ [boxR,diaL]
+    val bound_rls   = bound_rls @ [boxL,diaR]
+    val aside_rls   = [lstar0,lstar1,lstar2,rstar0,rstar1,rstar2]
+   end;
+end;
+structure S4_Prover = Modal_ProverFun(MP_Rule);