| changeset 58871 | c399ae4b836f |
| parent 45602 | 2a858377c3d2 |
| child 60375 | b35b08a143b2 |
--- a/src/ZF/Induct/Tree_Forest.thy Sun Nov 02 16:09:35 2014 +0100 +++ b/src/ZF/Induct/Tree_Forest.thy Sun Nov 02 16:39:54 2014 +0100 @@ -3,7 +3,7 @@ Copyright 1994 University of Cambridge *) -header {* Trees and forests, a mutually recursive type definition *} +section {* Trees and forests, a mutually recursive type definition *} theory Tree_Forest imports Main begin