src/FOL/ex/Natural_Numbers.thy
changeset 11679 afdbee613f58
parent 11673 79e5536af6c4
child 11696 233362cfecc7
     1.1 --- a/src/FOL/ex/Natural_Numbers.thy	Thu Oct 04 15:28:26 2001 +0200
     1.2 +++ b/src/FOL/ex/Natural_Numbers.thy	Thu Oct 04 15:29:22 2001 +0200
     1.3 @@ -18,7 +18,7 @@
     1.4  
     1.5  axioms
     1.6    induct [induct type: nat]:
     1.7 -    "P(0) \<Longrightarrow> (!!x. P(x) ==> P(Suc(x))) ==> P(n)"
     1.8 +    "P(0) ==> (!!x. P(x) ==> P(Suc(x))) ==> P(n)"
     1.9    Suc_inject: "Suc(m) = Suc(n) ==> m = n"
    1.10    Suc_neq_0: "Suc(m) = 0 ==> R"
    1.11    rec_0: "rec(0, a, f) = a"