Tue, 13 Dec 2011 14:02:02 +0100 add lemma bin_nth_zero
huffman [Tue, 13 Dec 2011 14:02:02 +0100] rev 45853
add lemma bin_nth_zero
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip