| Mon, 20 Sep 2010 21:52:45 +0800 | Christian Urban | introduced a general procedure for structural inductions; simplified reflexivity proof | file | diff | annotate |
| Sun, 12 Sep 2010 22:46:40 +0800 | Christian Urban | tuned code | file | diff | annotate |
| Sat, 11 Sep 2010 05:56:49 +0800 | Christian Urban | tuned (to conform with indentation policy of Markus) | file | diff | annotate |