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doc-src/TutorialI/CTL/CTL.thy
changeset 18724 cb6e0064c88c
parent 17914 99ead7a7eb42
child 21260 11ba04d15f36 
--- a/doc-src/TutorialI/CTL/CTL.thy	Thu Jan 19 21:22:29 2006 +0100
+++ b/doc-src/TutorialI/CTL/CTL.thy	Thu Jan 19 21:22:30 2006 +0100
@@ -10,7 +10,7 @@
 @{text formula} by a new constructor
 *};
 (*<*)
-datatype formula = Atom atom
+datatype formula = Atom "atom"
                   | Neg formula
                   | And formula formula
                   | AX formula
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