Yuqi Xu

collaborators

3 papers

math.CO2026

A characterization of tight ( $k, 0$ )-stable graphs

Yuqi Xu, Weihua Yang, Xiaxia Guan

Let k and l be two non-negative integers with k > l. A graph G is (k,l)-stable if alpha(G - S) >= alpha(G) - l for every subset S of V(G) with |S| = k, where alpha(G) denotes the i…

math.CO2026

An excluded minor theorem for the 6-wheel

Zijun Chen, Yuqi Xu, Weihua Yang

For each integer $n \geq 3$ , the wheel graph $W_{n}$ is defined as the graph obtained by connecting a single vertex to all vertices of a cycle of length $n$ . In particular, $W_{6}$ can…

math.CO2026

A characterization of 4-connected graphs with no 6-wheel minor

Zijun Chen, Yuqi Xu, Weihua Yang

For each integer $n \geq 3$ , let $W_{n}$ denote the wheel graph obtained by connecting a single vertex to all vertices of a cycle of length $n$ . In particular, $W_{6}$ is obtained from…

A characterization of tight (k,0)-stable graphs

An excluded minor theorem for the 6-wheel

A characterization of 4-connected graphs with no 6-wheel minor

A characterization of tight ( $k, 0$ )-stable graphs