Wed, 01 Apr 2009 11:34:21 -0700 huffman merged
Wed, 01 Apr 2009 11:31:24 -0700 huffman generalized setprod_nonneg and setprod_pos to ordered_semidom, simplified proofs
Wed, 01 Apr 2009 18:41:15 +0200 nipkow added nat_div_gt_0 [simp]
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip