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Coherence vs noncoherence


Speaker: Michael Kapovich, UC Davis
Location: 2112 MSB
Start time: Tue, Apr 7 2009, 4:10PM

A group G is called coherent if every finitely-generated subgroup of G is finitely-presented. One of the first nontrivial results about coherence is a theorem of Peter Scott that all 3-manifold groups are coherent. In this talk I will give a survey of known results and open problems about (in)coherence.