Zhenyu Ni

activity

20152026

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math.CO2026

Size Ramsey minimal graphs for uniform star forests

Pingting Fu, Zhidan Luo, Zhenyu Ni

For given graphs $G_{1}, G_{2}, \dots, G_{t}$ and $G$ , let $G \to (G_{1}, G_{2}, \dots, G_{t})$ denote that each $t$ -coloring of $E (G)$ yields a monochromatic copy of $G_{i}…

math.CO2026

Spectral Turán Problems for Expanded hypergraphs

Zhenyu Ni, Dongquan Cheng, Jing Wang +1

Given a graph $F$ , the expansion $F^{(r)}$ of $F$ is defined as the $r$ -uniform hypergraph obtained from $F$ by adding a set of $(r - 2)$ distinct new vertices to each edge of $F$ . I…