Yuefeng Yang

activity

20232026

collaborators

Showing 2024Show all

2 papers · 1 filter

math.CO2024

(Total) Perfect codes in (extended) subgroup sum graphs

Xuanlong Ma, Yuefeng Yang, Liangliang Zhai

Given a finite group $G$ with identity $e$ and a normal subgroup $H$ of $G$ , the subgroup sum graph $Γ_{G, H}$ (resp. extended subgroup sum graph $Γ_{G, H}^{+}$ ) of $G$ with respect to…

math.CO2024

Every nonsymmetric $4$ -class association scheme can be generated by a digraph

Yuefeng Yang

A (di)graph $Γ$ generates a commutative association scheme $X$ if and only if the adjacency matrix of $Γ$ generates the Bose-Mesner algebra of $X$ . In [17, Th…

(Total) Perfect codes in (extended) subgroup sum graphs

Every nonsymmetric 4-class association scheme can be generated by a digraph

Every nonsymmetric $4$ -class association scheme can be generated by a digraph