Thu, 12 Sep 2019 21:12:54 +0100 question
Chengsong [Thu, 12 Sep 2019 21:12:54 +0100] rev 352
question
Thu, 12 Sep 2019 19:44:12 +0100 question marked by HERE
Chengsong [Thu, 12 Sep 2019 19:44:12 +0100] rev 351
question marked by HERE
Thu, 12 Sep 2019 18:06:01 +0100 proof attempt
Chengsong [Thu, 12 Sep 2019 18:06:01 +0100] rev 350
proof attempt
(0) -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 tip