| Wed, 09 Feb 2011 07:27:30 +0000 | urbanc | a bit more on the paper | file | diff | annotate |
| Wed, 09 Feb 2011 06:09:46 +0000 | urbanc | added something about Setalt and folds | file | diff | annotate |
| Wed, 09 Feb 2011 04:54:23 +0000 | urbanc | deleted the non_empty invariant | file | diff | annotate |