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Conjugation-free groups, lower central series and line arrangements
The quotients $G_k/G_{k+1}$ of the lower central series of a finitely presented group $G$ are an important invariant of this group. In this work we investigate the... -
The Number of Sides of a Parallelogram
International audience -
Abelian and metabelian quotients of surface braid groups
This paper supersedes arXiv:1106.4982. The results of previous paper have been revisited and improved and new results have been added. -
Combinatorial properties of virtual braids
We study combinatorial properties of virtual braid groups and we describe relations with finite type invariant theory for virtual knots and Yang-Baxter equations
