Tue, 01 Jul 2014 15:57:07 +0200 hoelzl Library/Tree: bst is preferred to be a function
Tue, 01 Jul 2014 15:25:27 +0200 hoelzl Library/Tree: use datatype_new, bst is an inductive predicate
Mon, 30 Jun 2014 15:45:25 +0200 hoelzl more equalities of topological filters; strengthen dependent_nat_choice; tuned a couple of proofs
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