Thu, 22 Aug 2019 12:44:48 +0200 Christian Urban deleted .DS_Store
Thu, 22 Aug 2019 09:38:18 +0100 Chengsong counterexample
Sun, 18 Aug 2019 22:21:01 +0100 Chengsong label fix
(0) -30 -10 -3 +3 +10 +30 tip