| Thu, 18 Mar 2010 19:39:01 +0100 | Christian Urban | another little bit for the introduction | file | diff | annotate |
| Thu, 18 Mar 2010 18:43:03 +0100 | Christian Urban | more of the introduction | file | diff | annotate |
| Thu, 18 Mar 2010 16:22:10 +0100 | Christian Urban | corrected the strong induction principle in the lambda-calculus case; gave a second (oartial) version that is more elegant | file | diff | annotate |