Tue, 22 Sep 2015 16:53:59 +0100 paulson Prepared two non-terminating proofs; no obvious link with my changes
Wed, 23 Sep 2015 09:47:04 +0200 nipkow added AVL and lookup function
Wed, 23 Sep 2015 09:14:22 +0200 nipkow tuned
Tue, 22 Sep 2015 17:13:13 +0200 nipkow merged
Tue, 22 Sep 2015 17:13:01 +0200 nipkow unified isin-proofs
Tue, 22 Sep 2015 16:05:19 +0200 haftmann tuned
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