Where can I find a presentation (by `natural' generators and relations between them) of the pure braid groups $PB_n(S)$ (for $n>0$) of $S=\mathbb C^2\setminus (\mathbb Z\oplus i \mathbb Z)$?
Thanks in advance.
Pure braid groups of the complement of a lattice in the complex plane: generators and relations
Lucien
- 838
- 4
- 9