Tue, 06 Oct 2020 20:34:29 +0100 paulson Simplified some proofs
Tue, 06 Oct 2020 16:55:56 +0200 nipkow added lemmas; internalized defn in class
Mon, 05 Oct 2020 22:53:40 +0100 paulson merged
Mon, 05 Oct 2020 20:58:23 +0100 paulson still not quite fixed...
Mon, 05 Oct 2020 18:48:41 +0100 paulson A few more reversions
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
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