Wed, 25 Feb 2009 09:09:50 -0800 add lemmas about comparisons of Fract a b with 0 and 1
huffman [Wed, 25 Feb 2009 09:09:50 -0800] rev 30095
add lemmas about comparisons of Fract a b with 0 and 1
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip