Mon, 05 Oct 2020 18:46:15 +0100 paulson reversion to the explicit existential quantifier
Mon, 05 Oct 2020 12:47:19 +0100 paulson more tidying of messy proofs
Mon, 05 Oct 2020 22:49:46 +0200 wenzelm clarified signature;
Mon, 05 Oct 2020 22:23:17 +0200 wenzelm clarified signature;
Mon, 05 Oct 2020 22:07:25 +0200 wenzelm clarified signature;
Mon, 05 Oct 2020 21:15:58 +0200 wenzelm clarified signature;
Sat, 03 Oct 2020 23:01:40 +0100 paulson merged
Sat, 03 Oct 2020 20:47:58 +0100 paulson merged
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