src/HOL/Set.thy
changeset 13113 5eb9be7b72a5
parent 13103 66659a4b16f6
child 13421 8fcdf4a26468
     1.1 --- a/src/HOL/Set.thy	Tue May 07 19:15:11 2002 +0200
     1.2 +++ b/src/HOL/Set.thy	Tue May 07 19:54:04 2002 +0200
     1.3 @@ -260,7 +260,7 @@
     1.4      choice of @{prop "x:A"}. *}
     1.5    by (unfold Bex_def) blast
     1.6  
     1.7 -lemma rev_bexI: "x:A ==> P x ==> EX x:A. P x"
     1.8 +lemma rev_bexI [intro?]: "x:A ==> P x ==> EX x:A. P x"
     1.9    -- {* The best argument order when there is only one @{prop "x:A"}. *}
    1.10    by (unfold Bex_def) blast
    1.11