activity
20242026
most citedRicci curvature, diameter and eigenvalues of amply regular graphs

1 citations · 1 across the 10 of their papers we have counts for

collaborators
Showing 2024Show all

3 papers · 1 filter

math.CO2024

Diameter bounds for distance-regular graphs via long-scale Ollivier Ricci curvature

Kaizhe Chen, Shiping Liu

In this paper, we derive new sharp diameter bounds for distance regular graphs, which better answer a problem raised by Neumaier and Penji\' c in many cases. Our proof is built upo…

math.DG2024★ 1 cited

Ricci curvature, diameter and eigenvalues of amply regular graphs

Kaizhe Chen, Chunyang Hu, Shiping Liu +1

Amply regular graphs are graphs with local distance-regularity constraints. In this paper, we prove a weaker version of a conjecture proposed by Qiao, Park, and Koolen on diameter…

math.CO2024

Curvature and local matchings of conference graphs and extensions

Kaizhe Chen, Shiping Liu, Heng Zhang

We prove a conjecture of Bonini et al. on the precise values of the Lin--Lu--Yau curvature of conference graphs, i.e., strongly regular graphs with parameters . Ou…