diff -r d8205bb279a7 -r 216d6ed87399 doc-src/Intro/arith.thy
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc-src/Intro/arith.thy	Wed Nov 10 05:06:55 1993 +0100
@@ -0,0 +1,6 @@
+Arith = FOL +
+classes arith < term
+consts  "0"     :: "'a::arith"                  ("0")
+        "1"     :: "'a::arith"                  ("1")
+        "+"     :: "['a::arith,'a] => 'a"       (infixl 60)
+end