组合数学讨论班
来源：乐竞(中国)一站式服务平台
发布时间：2025-09-23
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报告题目: Constructions of distance biregular graphs
报 告 人: Professor Akhiro Munemasa (Tohoku University)
时 间: 10:00-11:00, September 18, 2025
地 点：820 Haina Complex Building 2
摘 要: We construct a new family of distance-biregular graphs related to hyperovals and a new sporadic example of a distance-biregular graph related to Mathon's perp system. The infinite family can be explained using 2-Y- homogeneity, while the sporadic example belongs to a generalization of a construction by Delorme. Additionally, we give a new non-existence criteria for distance-biregular graphs. This is joint work with Blas Fernández, Ferdinand Ihringer and Sabrina Lato.