Yaoping Hou

most citedTurán problem for

C_{2 k + 1}^{-}

-free signed graph

1 citations · 1 across the 6 of their papers we have counts for

collaborators

6 papers

math.CO2026

A lifting theorem for generalized Turán numbers of triangles

Junjie Wang, Yaoping Hou

For graphs $H$ and $F$ , the generalized Turán number $ex (n, H, F)$ denotes the maximum number of copies of $H$ in an $n$ -vertex $F$ -free graph. We prove a general lift…

math.CO2026

The maximum number of edges in $C_{2 k + 1}^{-}$ -free unbalanced signed graphs with bounded clique number

Junjie Wang, Yaoping Hou

Recently, the Turán problem for graphs with bounded clique number has attracted considerable attention. Since a graph can be regarded as a signed graph without negative edges, it i…

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…

math.CO2023

On the eigenvalues and Seidel eigenvalues of chain graphs

Zhuang Xiong, Yaoping Hou

In this paper we consider the eigenvalues and the Seidel eigenvalues of a chain graph. An$\dbar$elić, da Fonseca, Simić, and Du \cite{andelic2020tridiagonal} conjectured that there…

math.CO2023★ 1 cited

Turán problem for $C_{2 k + 1}^{-}$ -free signed graph

Junjie Wang, Yaoping Hou, Xueyi Huang

In this paper, we study the Turán problem for $C_{2 k + 1}^{-}$ . Suppose that $G ˙$ is an unbalanced signed graph of order $n$ with $e (G ˙)$ edges. Let $λ_{1} (G ˙)$ be th…

A lifting theorem for generalized Turán numbers of triangles

The maximum number of edges in C2k+1−​-free unbalanced signed graphs with bounded clique number

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

Maxima of the index: forbidden unbalanced cycles

On the eigenvalues and Seidel eigenvalues of chain graphs

Turán problem for C2k+1−​-free signed graph

The maximum number of edges in $C_{2 k + 1}^{-}$ -free unbalanced signed graphs with bounded clique number

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

Turán problem for $C_{2 k + 1}^{-}$ -free signed graph