diff -r f04b33ce250f -r a4dc62a46ee4 ex/LexProd.thy
--- a/ex/LexProd.thy	Tue Oct 24 14:59:17 1995 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,15 +0,0 @@
-(*  Title: 	HOL/ex/lex-prod.thy
-    ID:         $Id$
-    Author: 	Tobias Nipkow, TU Munich
-    Copyright   1993  TU Munich
-
-The lexicographic product of two relations.
-*)
-
-LexProd = WF + Prod +
-consts "**" :: "[('a*'a)set, ('b*'b)set] => (('a*'b)*('a*'b))set" (infixl 70)
-rules
-lex_prod_def "ra**rb == {p. ? a a' b b'. 
-	p = <<a,b>,<a',b'>> & (<a,a'> : ra | a=a' & <b,b'> : rb)}"
-end
-