Wed, 23 Nov 2022 09:54:53 +0100 desharna added lemmas irrefl_on_subset and irreflp_on_subset
Mon, 21 Nov 2022 14:11:30 +0100 desharna introduced predicates irrefl_on and irreflp_on, and redefined irrefl and irreflp as abbreviations
Mon, 05 Dec 2022 15:19:52 +0100 wenzelm tuned messages;
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