Fri, 13 Mar 2009 07:30:47 -0700 introduce new helper functions; clean up proofs
huffman [Fri, 13 Mar 2009 07:30:47 -0700] rev 30505
introduce new helper functions; clean up proofs
Fri, 13 Mar 2009 13:06:36 +0100 merged
nipkow [Fri, 13 Mar 2009 13:06:36 +0100] rev 30504
merged
Fri, 13 Mar 2009 13:06:00 +0100 added comment
nipkow [Fri, 13 Mar 2009 13:06:00 +0100] rev 30503
added comment
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