Tue, 29 May 2012 11:30:13 +0200 remove unused intermediate lemma
huffman [Tue, 29 May 2012 11:30:13 +0200] rev 48011
remove unused intermediate lemma
Tue, 29 May 2012 11:13:00 +0200 shortened more multiset proofs
huffman [Tue, 29 May 2012 11:13:00 +0200] rev 48010
shortened more multiset proofs
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