Fri, 16 Sep 2016 12:30:55 +0200 haftmann prefer abbreviation for trivial set conversion
Fri, 16 Sep 2016 12:30:55 +0200 haftmann more lemmas
Fri, 16 Sep 2016 21:40:47 +0200 wenzelm merged
Fri, 16 Sep 2016 21:35:19 +0200 wenzelm more symbols -- as in the printed document;
Fri, 16 Sep 2016 21:28:09 +0200 wenzelm more symbols;
Fri, 16 Sep 2016 18:44:18 +0200 Lars Hupel tuned proofs
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