Wed, 03 Nov 2010 15:57:39 -0700 add lemma eq_imp_below
huffman [Wed, 03 Nov 2010 15:57:39 -0700] rev 40432
add lemma eq_imp_below
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip