Wed, 05 Apr 2000 21:07:09 +0200 wenzelm added NestedDatatype.thy;
Wed, 05 Apr 2000 21:06:52 +0200 wenzelm added NestedDatatype;
Wed, 05 Apr 2000 21:06:37 +0200 wenzelm fixed goal selection;
Wed, 05 Apr 2000 21:06:06 +0200 wenzelm Isar: simplified (more robust) goal selection of proof methods;
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