Mon, 02 Oct 2006 18:30:10 +0200 add lemmas norm_not_less_zero, norm_le_zero_iff
huffman [Mon, 02 Oct 2006 18:30:10 +0200] rev 20828
add lemmas norm_not_less_zero, norm_le_zero_iff
Mon, 02 Oct 2006 17:33:13 +0200 added is_Trueprop
paulson [Mon, 02 Oct 2006 17:33:13 +0200] rev 20827
added is_Trueprop
Mon, 02 Oct 2006 17:32:18 +0200 tidying and simplifying
paulson [Mon, 02 Oct 2006 17:32:18 +0200] rev 20826
tidying and simplifying
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