Yaoping Hou

collaborators

2 papers

math.CO2023

Extremal results for $K_{r + 1}^{-}$ -free signed graphs

Zhuang Xiong, Yaoping Hou

This paper gives tight upper bounds on the number of edges and the index for $K_{r + 1}^{-}$ -free unbalanced signed graphs, where $K_{r + 1}^{-}$ is the set of $r+1…

math.CO2023

Maxima of the index: forbidden unbalanced cycles

Zhuang Xiong, Yaoping Hou

This paper aims to address the problem: what is the maximum index among all $C_{r}^{-}$ -free unbalanced signed graphs, where $C_{r}^{-}$ is the set of unbalanced cycle…

Extremal results for Kr+1−​-free signed graphs

Maxima of the index: forbidden unbalanced cycles

Extremal results for $K_{r + 1}^{-}$ -free signed graphs