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math.GR2020
Isoperimetric inequalities for Poincaré duality groups
Dawid Kielak, Peter Kropholler
We show that every oriented -dimensional Poincaré duality group over a -ring is amenable or satisfies a linear homological isoperimetric inequality in dimension . As…
math.GR2020
Betti numbers and coherence of random groups
Dawid Kielak, Robert Kropholler, Gareth Wilkes
We study Betti numbers, coherence, and virtual fibring of random groups in the few-relator model. In particular, random groups with negative Euler characteristic are coher…