--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/ex/IntRingDefs.thy	Thu Jun 25 13:57:34 1998 +0200
@@ -0,0 +1,15 @@
+(*  Title:      HOL/Integ/IntRingDefs.thy
+    ID:         $Id$
+    Author:     Tobias Nipkow and Markus Wenzel
+    Copyright   1996 TU Muenchen
+
+Provides the basic defs and thms for showing that int is a commutative ring.
+Most of it has been defined and shown already.
+*)
+
+IntRingDefs = Integ + Ring +
+
+instance int :: zero
+defs zero_int_def "zero::int == $# 0"
+
+end