Sat, 24 Oct 2020 12:13:39 +0100 Christian Urban updated
Wed, 18 Sep 2019 16:35:57 +0100 Christian Urban updated
Tue, 17 Sep 2019 08:42:13 +0100 Christian Urban a bit more cleaning up
Sat, 14 Sep 2019 13:25:56 +0100 Christian Urban added "big" lemma
Fri, 13 Sep 2019 17:46:44 +0100 Chengsong lemma proved
Fri, 13 Sep 2019 15:39:11 +0100 Chengsong marked by QUESTION
(0) -300 -100 -30 -10 -6 +6 +10 +30 +100 +300 tip