20 Sep
2001
20 Sep
'01
10:29 p.m.
There are various ways this category could be formulated (are the strings allowed to cross each other? are they allowed to double back? etc), but my question is: has anything been written about it? Does it have a name? Does it remind anyone of another category which has been studied?
I vaguely recall these being referred to as "vines", and I think a text by Joan Birman dealt with them a little. I'm not sure as to how far these things were "categorified", though. Sorry for being so vague, Duraid 23-Sep-2001 13:22:35 -0300,2528;000000000000-00000020