Tue, 08 May 2007 04:55:19 +0200 add lemma abs_norm_cancel
huffman [Tue, 08 May 2007 04:55:19 +0200] rev 22857
add lemma abs_norm_cancel
Tue, 08 May 2007 03:03:23 +0200 cleaned up
huffman [Tue, 08 May 2007 03:03:23 +0200] rev 22856
cleaned up
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