Mon, 22 Jul 2019 23:01:00 +0100 works on the part that christian did not read
Chengsong [Mon, 22 Jul 2019 23:01:00 +0100] rev 79
works on the part that christian did not read will continue tomorrow morning
Mon, 22 Jul 2019 22:30:47 +0100 proof of big lemma
Chengsong [Mon, 22 Jul 2019 22:30:47 +0100] rev 78
proof of big lemma
(0) -30 -10 -2 +2 +10 +30 tip