| Fri, 27 Feb 2009 15:59:38 +0000 | Christian Urban | added material to the endless story of the simplifier | changeset | files |
| Fri, 27 Feb 2009 13:02:19 +0000 | Christian Urban | added more material to the attribute section; merged the recipe about named theorems into the main body; added a solution to an exercise in the conversion section | changeset | files |