diff -r 451104c223e2 -r e534c4c32d54 src/HOL/AxClasses/Lattice/LatMorph.ML
--- a/src/HOL/AxClasses/Lattice/LatMorph.ML	Wed Nov 05 13:14:15 1997 +0100
+++ b/src/HOL/AxClasses/Lattice/LatMorph.ML	Wed Nov 05 13:23:46 1997 +0100
@@ -5,49 +5,49 @@
 (** monotone functions vs. "&&"- / "||"-semi-morphisms **)
 
 goalw thy [is_mono_def] "is_mono f = (ALL x y. f (x && y) [= f x && f y)";
-  by (safe_tac (claset()));
+  by Safe_tac;
   (*==> (level 1)*)
     by (stac le_inf_eq 1);
-    br conjI 1;
+    by (rtac conjI 1);
     by (Step_tac 1);
     by (Step_tac 1);
-    be mp 1;
-    br inf_lb1 1;
+    by (etac mp 1);
+    by (rtac inf_lb1 1);
     by (Step_tac 1);
     by (Step_tac 1);
-    be mp 1;
-    br inf_lb2 1;
+    by (etac mp 1);
+    by (rtac inf_lb2 1);
   (*==> (level 11)*)
-    br (conjI RS (le_trans RS mp)) 1;
-    br inf_lb2 2;
+    by (rtac (conjI RS (le_trans RS mp)) 1);
+    by (rtac inf_lb2 2);
     by (subgoal_tac "x && y = x" 1);
-    be subst 1;
+    by (etac subst 1);
     by (Fast_tac 1);
     by (stac inf_connect 1);
-    ba 1;
+    by (assume_tac 1);
 qed "mono_inf_eq";
 
 goalw thy [is_mono_def] "is_mono f = (ALL x y. f x || f y [= f (x || y))";
-  by (safe_tac (claset()));
+  by Safe_tac;
   (*==> (level 1)*)
     by (stac ge_sup_eq 1);
-    br conjI 1;
+    by (rtac conjI 1);
     by (Step_tac 1);
     by (Step_tac 1);
-    be mp 1;
-    br sup_ub1 1;
+    by (etac mp 1);
+    by (rtac sup_ub1 1);
     by (Step_tac 1);
     by (Step_tac 1);
-    be mp 1;
-    br sup_ub2 1;
+    by (etac mp 1);
+    by (rtac sup_ub2 1);
   (*==> (level 11)*)
-    br (conjI RS (le_trans RS mp)) 1;
-    br sup_ub1 1;
+    by (rtac (conjI RS (le_trans RS mp)) 1);
+    by (rtac sup_ub1 1);
     by (subgoal_tac "x || y = y" 1);
-    be subst 1;
+    by (etac subst 1);
     by (Fast_tac 1);
     by (stac sup_connect 1);
-    ba 1;
+    by (assume_tac 1);
 qed "mono_sup_eq";