Condensed Ricci curvature conjecture for strongly regular conference graphs

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Let G=(V,E)G=(V,E) be a strongly regular conference graph with parameters

(4β+1,2β,β−1,β)(4\beta+1,2\beta,\beta-1,\beta)

where β≥2\beta\geq 2. The condensed Ricci curvature conjecture. The condensed Ricci curvature satisfies

k(x,y)=12+12β\Bbbk(x,y)=\frac{1}{2}+\frac{1}{2\beta}

for every edge xy∈Exy\in E. In particular, every strongly regular conference graph has positive condensed Ricci curvature strictly greater than 12\frac{1}{2}. The conjecture is expected to follow from the matching criterion in the cited theorem if the neighbor sets of every adjacent pair admit perfect matchings; the paper states that this is left for future work.

References

Primary source

Vincent Bonini, Conor Carroll, Uyen Dinh, Sydney Dye, Joshua Frederick and Erin Pearse, “Condensed Ricci Curvature of Complete and Strongly Regular Graphs”, arXiv:1907.06733 (2019).

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