Sami Douba

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math.GR2021

Proper CAT(0) actions of unipotent-free linear groups

Sami Douba

Let $Γ$ be a finitely generated group of matrices over $C$ . We construct an isometric action of $Γ$ on a complete CAT(0) space $X$ such that the restriction of this action…

math.GR2021

Virtually unipotent curves in some non-NPC graph manifolds

Sami Douba

Let $M$ be a graph manifold containing a single JSJ torus $T$ and whose JSJ blocks are of the form $Σ \times S^{1}$ , where $Σ$ is a compact orientable surface with boundary. We show t…