The finitely generated groups twin-width conjecture

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Let Γ\Gamma be a countable group generated by a finite set SS, and let Cay⁡(Γ,S)\operatorname{Cay}(\Gamma,S) be its Cayley graph with vertex set Γ\Gamma and edges {x,x⋅s}\{x,x\cdot s\} for x∈Γx\in\Gamma and s∈Ss\in S. Let F(Γ,S)F(\Gamma,S) be the class of all finite induced subgraphs of Cay⁡(Γ,S)\operatorname{Cay}(\Gamma,S).

Finitely generated groups conjecture. For every group Γ\Gamma generated by a finite set SS, the class F(Γ,S)F(\Gamma,S) has bounded twin-width.

The question is motivated by the examples of free groups and the integer grid, whose associated classes have bounded twin-width. The supplied text presents this as the main question of the section and gives no resolution.

References

Primary source

Édouard Bonnet, Colin Geniet, Eun Jung Kim, Stéphan Thomassé and Rémi Watrigant, “Twin-width II: small classes”, arXiv:2006.09877 (2020).

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