Wed, 13 Dec 2006 12:10:54 +0100 wenzelm tuned comments;
Wed, 13 Dec 2006 12:07:43 +0100 krauss added IsarAdvanced/Functions
Wed, 13 Dec 2006 00:07:13 +0100 huffman generalized some lemmas; removed redundant lemmas; cleaned up some proofs
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