Tue, 11 May 2010 06:27:06 -0700 add lemma power2_eq_1_iff; generalize some other lemmas
huffman [Tue, 11 May 2010 06:27:06 -0700] rev 36823
add lemma power2_eq_1_iff; generalize some other lemmas
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip