| Sat, 15 Jan 2011 20:24:16 +0000 | Christian Urban | nominal_function works now completely for frees and depth; still a propbelm with subst; no unproved assumptions | file | diff | annotate |
| Mon, 10 Jan 2011 11:36:55 +0000 | Christian Urban | a few lemmas about freshness for at and at_base | file | diff | annotate |