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math.MG2010
Projections and relative hyperbolicity
Alessandro Sisto
We give an alternative definition of relative hyperbolicity based on properties of closest-point projections on peripheral subgroups. We also derive a distance formula for relative…
math.MG2010★ 3 cited
Separable and tree-like asymptotic cones of groups
Alessandro Sisto
Using methods from nonstandard analysis, we will discuss which metric spaces can be realized as asymptotic cones. Applying the results we will find in the context of groups, we wil…