Thu, 11 Apr 2019 12:18:03 +0200 wenzelm tuned signature;
Thu, 11 Apr 2019 12:05:36 +0200 wenzelm clarified order;
Wed, 10 Apr 2019 23:12:27 +0100 paulson merged
Wed, 10 Apr 2019 23:12:16 +0100 paulson prod/sum fixes
Wed, 10 Apr 2019 21:29:32 +0100 paulson Fixing the main Homology theory; also moving a lot of sum/prod lemmas into their generic context
Wed, 10 Apr 2019 23:45:20 +0200 wenzelm tuned layout;
Wed, 10 Apr 2019 23:35:25 +0200 wenzelm updated screenshots;
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