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src/HOL/ex/NatSum.thy
changeset 1376 92f83b9d17e1
parent 969 b051e2fc2e34
child 1476 608483c2122a 
--- a/src/HOL/ex/NatSum.thy	Thu Nov 30 12:58:44 1995 +0100
+++ b/src/HOL/ex/NatSum.thy	Fri Dec 01 12:03:13 1995 +0100
@@ -7,7 +7,7 @@
 *)
 
 NatSum = Arith +
-consts sum     :: "[nat=>nat, nat] => nat"
+consts sum     :: [nat=>nat, nat] => nat
 rules  sum_0      "sum f 0 = 0"
        sum_Suc    "sum f (Suc n) = f(n) + sum f n"
 end
isabelle