| Wed, 12 Oct 2011 20:16:48 +0200 | wenzelm | tuned proofs -- eliminated vacuous "induct arbitrary: ..." situations; | file | diff | annotate |
| Sat, 03 Sep 2011 17:56:33 +0200 | haftmann | tuned proof | file | diff | annotate |
| Mon, 21 Feb 2011 17:43:23 +0100 | wenzelm | modernized specifications; | file | diff | annotate |