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具有秩6 Weisfeiler--Leman闭包的非传递有向强正则图的无限族

An infinite family of intransitive directed strongly regular graphs with rank 6 Weisfeiler--Leman closure

Štefan Gyürki

arXiv 2609.25282首次发表:更新:

发表机构

Slovak University of Technology(斯洛伐克工业大学)

机构由 AI 辅助整理,请以论文原文为准。

AI 中文总结

本文构造了非传递全自同构群且Weisfeiler--Leman闭包为秩6结合方案的无限族有向强正则图,并展示零星例子,证明三种正则性概念捕捉图结构的不同方面。

AI 中文摘要

我们构造了一个无限族的有向强正则图(DSRGs),其全自同构群是非传递的,且它们的Weisfeiler--Leman闭包是秩为6的结合方案。这是允许适当DSRG合并的结合方案可能的最小秩。我们还展示了具有相同闭包性质的刚性零星DSRGs,表明组合正则性、群论对称性和Weisfeiler--Leman正则性捕捉了图结构根本不同的方面。

英文摘要

We construct an infinite family of directed strongly regular graphs (DSRGs) with intransitive full automorphism groups whose Weisfeiler--Leman closure are association schemes of rank 6. This is the smallest possible rank for an association scheme admitting a proper DSRG merging. We also exhibit rigid sporadic DSRGs with the same closure property, showing that combinatorial regularity, group-theoretic symmetry, and Weisfeiler--Leman regularity capture fundamentally different aspects of graph structure.

Comments9 pages

论文原文

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