Shiping Liu, Florentin Münch, Norbert Peyerimhoff
Published 2016-08-28Version 1
We prove diameter bounds for graphs having positive Ricci-curvature bound in Bakry-Emery sense. One result using only curvature and maximal vertex degree is sharp in case of hypercubes. The other result depends on an additional dimension bound, but is independent of the vertex degree. In particular, the second result is the first Bonnet-Myers type theorem for unbounded graph Laplacians. Moreover, our results improve diameter bounds from [3] and [6].
Rigidity properties of the hypercube via Bakry-Emery curvature
Entropic curvature not comparable to other curvatures -- or is it?
Ollivier Ricci curvature for general graph Laplacians: Heat equation, Laplacian comparison, non-explosion and diameter bounds
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