Mon, 03 Sep 2007 08:07:39 +0200 haftmann fixed Rat.inv
Mon, 03 Sep 2007 08:01:35 +0200 haftmann fixed Rat.inv
Sun, 02 Sep 2007 23:36:21 +0200 huffman fix sgn_div_norm class
Sun, 02 Sep 2007 12:34:20 +0200 urbanc made theorem-references safe
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