Wed, 19 Jan 2011 23:58:12 +0100 Christian Urban added a very rough version of the tutorial; all seems to work
Wed, 19 Jan 2011 19:41:50 +0100 Christian Urban added obtain_fresh lemma; tuned Lambda.thy
Wed, 19 Jan 2011 19:06:52 +0100 Christian Urban base file for the tutorial (contains definitions for heigt, subst and beta-reduction)
Wed, 19 Jan 2011 18:56:28 +0100 Christian Urban ported some of the old proofs to serve as testcases
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