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Questions about the branch of algebra that deals with groups.

3 votes
0 answers
254 views

The center of a derived subgroup in an amenable group

Let $G$ be a finitely generated amenable group and $G^{(i)}$ be a derived subgroup of $G$. What can we say about the center of $G^{(i)}$? Can we say the center of $G^{(i)}$ is non-trivial for $i$ la …
1 vote
1 answer
321 views

Orbits of Thompson's group

Thompson's group may act by homeomorphisms on the circle. Has this action a fixed point?
10 votes
1 answer
397 views

Locally Indicable Hyperbolic Groups

It is unknown whether a hyperbolic group is residually finite. Is it known under the additional hypothesis of locally indicability? Namely: Is a locally indicable hyperbolic group, residually finite?