Equivariant partite-presentation refinement for vertex transitive graphs

From papers

Let \Gha\Gha be a vertex transitive graph with a partite presentation PP such that \Gha=PCay(P)\Gha=\operatorname{PCay}(P), and let \GpaAutc-loc(\Gha)\Gpa\leq\operatorname{Aut}_{c\text{-}loc}(\Gha) be a transitive group. A cover is a graph map η:\Gha\sCP\eta:\Gha\to\sC_{P'} compatible with the stated presentation structure. Equivariant presentation conjecture. There exists a partite presentation PP' such that \Gha=PCay(P)\Gha=\operatorname{PCay}(P'), together with a cover η:\Gha\sCP\eta:\Gha\to\sC_{P'} and a homomorphism ϕ:\GpaAut(\sCP)\phi:\Gpa\to\operatorname{Aut}(\sC_{P'}) satisfying

η(gx)=ϕ(g)η(x)\eta(g\cdot x)=\phi(g)\cdot\eta(x)

for xV(\Gha)E(\Gha)x\in V(\Gha)\cup\overrightarrow{E}(\Gha). Thus the action of \Gpa\Gpa commutes with the cover. The source presents this as a possible generalisation of the procedure, but does not explicitly label it as an open conjecture.

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Primary source

Agelos Georgakopoulos, Matthias Hamann and Alex Wendland, “Presentations for Vertex Transitive Graphs”, arXiv:2007.06432 (2020).

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