Wed, 01 Jun 2022 10:07:00 +0200 wenzelm more robust;
Tue, 31 May 2022 22:10:48 +0200 wenzelm clarified signature (again);
Tue, 31 May 2022 16:01:30 +0200 wenzelm clarified signature;
Sat, 04 Jun 2022 15:59:24 +0200 desharna NEWS
Sat, 04 Jun 2022 16:00:14 +0200 desharna added lemmas reflp_on_subset, totalp_on_subset, and total_on_subset
Sat, 04 Jun 2022 15:43:34 +0200 desharna introduced predicate reflp_on and redefined reflp to be an abbreviation
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