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src/HOL/Datatype_Examples/TreeFsetI.thy

changeset 63167 | 0909deb8059b |

parent 58889 | 5b7a9633cfa8 |

child 66453 | cc19f7ca2ed6 |

--- a/src/HOL/Datatype_Examples/TreeFsetI.thy Thu May 26 16:57:14 2016 +0200 +++ b/src/HOL/Datatype_Examples/TreeFsetI.thy Thu May 26 17:51:22 2016 +0200 @@ -6,7 +6,7 @@ Finitely branching possibly infinite trees, with sets of children. *) -section {* Finitely Branching Possibly Infinite Trees, with Sets of Children *} +section \<open>Finitely Branching Possibly Infinite Trees, with Sets of Children\<close> theory TreeFsetI imports "~~/src/HOL/Library/FSet"