Mercurial Mercurial > hg > lexing / diff
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
thys/ReStar.thy
changeset 112 698967eceaf1
parent 111 289728193164
child 113 90fe1a1d7d0e 
--- a/thys/ReStar.thy	Wed Mar 02 14:35:50 2016 +0000
+++ b/thys/ReStar.thy	Thu Mar 03 08:22:39 2016 +0000
@@ -29,7 +29,7 @@
 definition
   Der :: "char \<Rightarrow> string set \<Rightarrow> string set"
 where
-  "Der c A \<equiv> {s. [c] @ s \<in> A}"
+  "Der c A \<equiv> {s. c # s \<in> A}"
 
 lemma Der_null [simp]:
   shows "Der c {} = {}"
lexing