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src/HOL/Extraction/Higman.thy
changeset 16417 9bc16273c2d4
parent 15801 d2f5ca3c048d
child 17145 e623e57b0f44 
--- a/src/HOL/Extraction/Higman.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/Extraction/Higman.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -6,7 +6,7 @@
 
 header {* Higman's lemma *}
 
-theory Higman = Main:
+theory Higman imports Main begin
 
 text {*
   Formalization by Stefan Berghofer and Monika Seisenberger,
isabelle