Babai–Godsil–Imrich–Lovász conjecture on generic GRRs

From papers

Let RR) be a group of order nn which is neither abelian nor generalised dicyclic. An inverse-closed subset SS of RR satisfies sSs1Ss\in S\Rightarrow s^{-1}\in S. A graphical regular representation (GRR) is a Cayley graph whose automorphism group is precisely the right-regular representation of RR.

Babai–Godsil–Imrich–Lovász conjecture. The proportion of inverse-closed subsets SS of RR such that Cay(R,S)\operatorname{Cay}(R,S) is a GRR goes to 11 as nn\to\infty.

The conjecture asserts that, apart from abelian and generalised dicyclic groups, almost every inverse-closed Cayley graph is a GRR. It was recently proved by Dobson and the last two authors, so its status is solved.

Progress summary

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Sources & referencesView supporting material

Primary source

Joy Morris, Pablo Spiga and Gabriel Verret, “Automorphisms of Cayley graphs on generalised dicyclic groups”, arXiv:1310.0618 (2013).

Additional references

2 papers in this index state this conjecture (2013). The statement above is taken from the most recent of them; the others are arXiv:1306.3747.

Source: https://arxiv.org/abs/1310.0618 Babai, Godsil, Imrich and Lovász, Conjecture 2.1 (as attributed in the source)

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