| Fri, 24 May 2013 18:11:57 +0200 | well-order extension (by Christian Sternagel) | file | diff | annotate |
| Wed, 24 Apr 2013 16:43:19 +0200 | optimized proofs | file | diff | annotate |
| Wed, 12 Sep 2012 05:29:21 +0200 | renamed "Ordinals_and_Cardinals" to "Cardinals" | file | diff | annotate | base |