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The Poincaré profile of a graph or group

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NPC - Non-positive curvature group actions and cohomology

Benjamini, Schramm and Timar introduced the notion of “separation profile” for a graph or finitely generated group.  I will discuss a family of invariants that generalise this idea, examples of the values obtained and applications to non-embedding results.   Joint work with David Hume and Romain Tessera.

This talk is part of the Isaac Newton Institute Seminar Series series.

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