On Vassiliev invariants of braid groups of the sphere
| Autor: | Kaabi, N., Vershinin, V. V. |
|---|---|
| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We construct a universal Vassiliev invariant for braid groups of the sphere and the mapping class groups of the sphere with $n$ punctures. The case of a sphere is different from the classical braid groups or braids of oriented surfaces of genus strictly greater than zero, since Vassiliev invariants in a group without 2-torsion do not distinguish elements of braid group of a sphere. Comment: 16 pages |
| Databáze: | arXiv |
| Externí odkaz: |
|