diff -r 4c54ef4dc84d -r 0fea8b7a14a1 ProgTutorial/Recipes/Sat.thy
--- a/ProgTutorial/Recipes/Sat.thy	Mon Oct 12 17:07:17 2009 +0200
+++ b/ProgTutorial/Recipes/Sat.thy	Tue Oct 13 22:57:25 2009 +0200
@@ -1,6 +1,6 @@
 
 theory Sat
-imports Main "../FirstSteps"
+imports "../Appendix" "../FirstSteps" 
 begin
 
 section {* SAT Solvers\label{rec:sat} *}