Distribution of accumulation points of roots for type $(n-1,1)$ Coxeter   groups
  In this paper, we investigate the set of accumulation points of normalized roots of infinite Coxeter groups for certain class of their action. Concretely, we prove the conjecture proposed in [6, Section 3.2] in the case where the equipped Coxeter matrices are of type $(n-1,1)$, where $n$ is the rank. Moreover, we obtain that the set of such accumulation points coincides with the closure of the orbit of one point of normalized limit roots. In addition, in order to prove our main results, we also investigate some properties on fixed points of the action. 
Akihiro Higashitani, Ryosuke Mineyama, and Norihiro Nakashima
math.GR math.CO math.DS math.MG