| 2010-04-20 | Christian Urban | renamed "_empty" and "_append" to "_zero" and "_plus" | file | diff | annotate |
| 2010-04-20 | Christian Urban | removed dead code (nominal cannot deal with argument types of constructors that are functions) | file | diff | annotate |
| 2010-04-20 | Christian Urban | added comment about abstraction in raw permuations | file | diff | annotate |
| 2010-04-20 | Christian Urban | optimised the code of define_raw_perm | file | diff | annotate |