Jianguo Qian

activity

20172022

most citedOn non-empty cross-intersecting families

1 citations · 1 across the 18 of their papers we have counts for

collaborators

Showing 2019Show all

2 papers · 1 filter

math.CO2019

Generalized spectral characterization of mixed graphs

Wei Wang, Lihong Qiu, Jianguo Qian

A mixed graph $G$ is a graph obtained from a simple undirected graph by orientating a subset of edges. $G$ is self-converse if it is isomorphic to the graph obtained from $G$ by re…

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…