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20122021
most citedA dichotomy for integral group rings via higher modular groups as amalgamated products

1 citations · 1 across the 7 of their papers we have counts for

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Showing 2015Show all

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math.GR2015

Presentations of Groups Acting Discontinuously on Direct Products of Hyperbolic Spaces

Eric Jespers, Ann Kiefer, Ángel del Río

The problem of describing the group of units of the integral group ring of a finite group has attracted a lot of attention and provid…

math.GR2015

Revisiting Poincaré's Theorem on presentations of discontinuous groups via fundamental polyhedra

Eric Jespers, Ann Kiefer, Ángel del Río

We give a new self-contained proof of Poincaré's Polyhedron Theorem on presentations of discontinuous groups of isometries of a Riemann manifold of constant curvature. The proof is…