Wed, 13 Jun 2007 16:43:02 +0200 clean up instance proofs; reorganize section headings
huffman [Wed, 13 Jun 2007 16:43:02 +0200] rev 23372
clean up instance proofs; reorganize section headings
Wed, 13 Jun 2007 14:21:54 +0200 reactivated theory Class;
wenzelm [Wed, 13 Jun 2007 14:21:54 +0200] rev 23371
reactivated theory Class;
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