| Fri, 27 May 2011 21:54:22 -0600 | Kevin Walker | more reorganization of n-cat defs | changeset | files |
| Fri, 27 May 2011 13:43:20 -0600 | Kevin Walker | start to rearrange n-cat defs | changeset | files |
| Wed, 25 May 2011 11:08:16 -0600 | Kevin Walker | corrected statement of module to category restrictions; note that this affects the numbering of items in subsection 6.4 | changeset | files |