Maoqun Wang

activity

20172021

collaborators

4 papers

math.CO2021

Ramsey numbers for complete graphs versus generalized fans

Maoqun Wang, Jianguo Qian

For two graphs $G$ and $H$ , let $r (G, H)$ and $r_{*} (G, H)$ denote the Ramsey number and star-critical Ramsey number of $G$ versus $H$ , respectively. In 1996, Li and Rousseau proved th…

math.CO2019

An Ore-type condition for existence of two disjoint cycles

Maoqun Wang, Jianguo Qian

Let $n_{1}$ and $n_{2}$ be two integers with $n_{1}, n_{2} \geq 3$ and $G$ a graph of order $n = n_{1} + n_{2}$ . As a generalization of Ore's degree condition for the existence of Hamilto…

math.CO2017

Vertex-disjoint directed cycles of prescribed length in tournaments with given minimum out-degree

Maoqun Wang, Weihua Yang

The Bermond-Thomassen conjecture states that, for any positive integer $r$ , a digraph of minimum out-degree at least $2 r - 1$ contains at least $r$ vertex-disjoint directed cycles. I…

math.CO2017

Vertex-disjoint cycles in tournaments

Maoqun Wang, Weihua Yang

The Bermond-Thomassen conjecture states that, for any positive integer $r$ , a digraph of minimum out-degree at least $2 r - 1$ contains at least $r$ vertex-disjoint directed cycles. B…