| Thu, 16 Feb 2012 08:12:01 +0000 | urbanc | one typo | file | diff | annotate |
| Sun, 12 Feb 2012 23:20:06 +0000 | urbanc | contribution section | file | diff | annotate |
| Wed, 08 Feb 2012 16:35:49 +0000 | urbanc | corrections by Xingyuan | file | diff | annotate |
| Mon, 06 Feb 2012 12:08:35 +0000 | urbanc | paper updatated | file | diff | annotate |
| Sat, 04 Feb 2012 22:56:14 +0000 | urbanc | updated | file | diff | annotate |
| Sat, 04 Feb 2012 00:14:41 +0000 | urbanc | slight polishing | file | diff | annotate |
| Thu, 02 Feb 2012 13:58:16 +0000 | urbanc | slight tuning | file | diff | annotate |
| Wed, 01 Feb 2012 17:46:36 +0000 | urbanc | more on intro | file | diff | annotate |
| Wed, 01 Feb 2012 17:40:00 +0000 | urbanc | more on intro | file | diff | annotate |
| Sun, 29 Jan 2012 09:31:03 +0000 | zhang | More explanations added by XY. | file | diff | annotate |
| Tue, 24 Jan 2012 00:20:09 +0000 | urbanc | initial version of the PIP formalisation | file | diff | annotate |