Chunyang Dou

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20242026

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3 papers · 1 filter

math.CO2026

Counting triangles in graphs without suspensions of paths

Chunyang Dou, Xing Peng

For a graph $H$ , the suspension $H$ of $H$ is a graph obtained from $H$ by joining a new vertex to every vertex of $H$ . The generalized Turán number $\textrm{ex}(n,K_3,\wi…

math.CO2026

Spectral Turán problems for suspensions of balanced trees

Yaoxiang Di, Chunyang Dou

A central problem in spectral Turán theory is to understand the relationship between the spectral extremal family $SPEX (n, F)$ and the ordinary extremal family $EX (n, F)$ …

math.CO2026

Counting triangles in graphs with no wheels of order at least five

Chunyang Dou, Bo Ning, Xing Peng

For a family of graphs $F$ , a graph $G$ is said to be $F$ -free if it contains no member of $F$ as a subgraph. A wheel graph $W_{k}$ is a graph on $k + 1$ ver…