Dan Li

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20242026

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math.CO2026

Spectral extremal problems on planar and outerplanar graphs without $C_{k,l}

Jiamin Li, Dan Li, Xilong Yin +1

Let $spex_{P} (n, F)$ and $spex_{O P} (n, F)$ be the maximum spectral radius among all $n$ -vertex $F$ -free planar graphs and outerplanar graphs, respec…

math.SP2026

Minimally $(k, k)$ -edge-connected graphs via spectral radius

Yu Wang, Dan Li, Huiqiu Lin

For $l > 1$ , the $l$ -edge-connectivity $κ_{l}^{'} (G)$ of a connected graph $G$ is defined as the minimum number of edges whose removal leaves a graph with at least $l$ components. A gra…

Spectral extremal problems on planar and outerplanar graphs without $C_{k,l}

Minimally (k,k)-edge-connected graphs via spectral radius

Minimally $(k, k)$ -edge-connected graphs via spectral radius