Small cancellation labellings of some infinite graphs and applications

By Damian Osajda. Acta Mathematica, 2014

111 citations recorded by the source corpus.

We construct small cancellation labellings for some infinite sequences of finite graphs of bounded degree. We use them to define infinite graphical small cancellation presentations of groups. This technique allows us to provide examples of groups with exotic properties: - We construct the first examples of finitely generated coarsely non-amenable groups (that is, groups without Guoliang Yu's Property A) that are coarsely embeddable into a Hilbert space. Moreover, our groups act properly on CAT(0) cubical complexes. - We construct the first examples of finitely generated groups, with expanders embedded isometrically into their Cayley graphs - in contrast,in the case of the Gromov monster expanders are not even coarsely embedded. We present further applications.

Subfields: Geometry and Topology, Mathematical Physics

View Paper: https://www.semanticscholar.org/paper/58c551be3bdd698b8401bb1a483dcaf0f1cb558d

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In Geometry and Topology

In Mathematical Physics

Citations in the corpus

Infinitely presented graphical small cancellation groups are acylindrically hyperbolic (2014, background): “Following this, Osajda recently showed, by probabilistic arguments, the existence of suitable small cancellation labellings of certain expander graphs [Osa14], thus completing this combinatorial construction.”