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src/HOL/Datatype_Examples/Derivation_Trees/Prelim.thy
changeset 66453 cc19f7ca2ed6
parent 63167 0909deb8059b 
--- a/src/HOL/Datatype_Examples/Derivation_Trees/Prelim.thy	Fri Aug 18 13:55:05 2017 +0200
+++ b/src/HOL/Datatype_Examples/Derivation_Trees/Prelim.thy	Fri Aug 18 20:47:47 2017 +0200
@@ -8,7 +8,7 @@
 section \<open>Preliminaries\<close>
 
 theory Prelim
-imports "~~/src/HOL/Library/FSet"
+imports "HOL-Library.FSet"
 begin
 
 notation BNF_Def.convol ("\<langle>(_,/ _)\<rangle>")
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