Longfei Fang

collaborators

3 papers

math.CO2024

Turán numbers for non-bipartite graphs and applications to spectral extremal problems

Longfei Fang, Michael Tait, Mingqing Zhai

Given a graph family $H$ with $min_{H \in H} χ (H) = r + 1 \geq 3$ . Let $ex (n, H)$ and $spex (n, H)$ be the maximum number of edges and th…

math.CO2024

Spectral extremal results on trees

Longfei Fang, Huiqiu Lin, Jinlong Shu +1

Let $spex (n, F)$ be the maximum spectral radius over all $F$ -free graphs of order $n$ , and $SPEX (n, F)$ be the family of $F$ -free graphs of order $n$ with spectral radius…

math.CO2023

Spectral extremal problem on the square of $ℓ$ -cycle

Longfei Fang, Yanhua Zhao

Let $C_{ℓ}$ be the cycle of order $ℓ$ . The square of $C_{ℓ}$ , denoted by $C_{ℓ}^{2}$ , is obtained by joining all pairs of vertices with distance no more than two in $C_…

Turán numbers for non-bipartite graphs and applications to spectral extremal problems

Spectral extremal results on trees

Spectral extremal problem on the square of ℓ-cycle

Spectral extremal problem on the square of $ℓ$ -cycle