changeset 23894 | 1a4167d761ac |
parent 22997 | d4f3b015b50b |
child 24993 | 92dfacb32053 |
--- a/src/HOL/Algebra/abstract/Ring2.thy Sat Jul 21 17:40:40 2007 +0200 +++ b/src/HOL/Algebra/abstract/Ring2.thy Sat Jul 21 23:25:00 2007 +0200 @@ -495,7 +495,7 @@ (* fields are integral domains *) lemma field_integral: "!! a::'a::field. a * b = 0 ==> a = 0 | b = 0" - apply (tactic "Step_tac 1") + apply (tactic "step_tac @{claset} 1") apply (rule_tac a = " (a*b) * inverse b" in box_equals) apply (rule_tac [3] refl) prefer 2