src/HOL/UNITY/LessThan.thy

+(*  Title:      HOL/UNITY/LessThan
+    ID:         $Id$
+    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
+    Copyright   1998  University of Cambridge
+
+lessThan, greaterThan, atLeast, atMost
+*)
+
+LessThan = List +
+
+constdefs
+
+  lessThan   :: "nat => nat set"
+     "lessThan n == {i. i<n}"
+
+  atMost   :: "nat => nat set"
+     "atMost n == {i. i<=n}"
+ 
+  greaterThan   :: "nat => nat set"
+     "greaterThan n == {i. n<i}"
+
+  atLeast   :: "nat => nat set"
+     "atLeast n == {i. n<=i}"
+
+end