4 papers
A construction of 2-arc-transitive non-solvable covers of complete graphs
Jiyong Chen, Cai Heng Li, Ci Xuan Wu +1
We construct connected -arc-transitive covers of complete graphs with non-abelian characteristically simple transformation groups. This solves the existence problem for non-solv…
The finite -set homogeneous graphs
Cai Heng Li, Fu-Gang Yin, Jin-Xin Zhou
A classification is given of finite -set-homogeneous graphs for , leading to a striking result that each finite -set-homogeneous graph is -homogeneous. It sh…
Covers and pseudocovers of symmetric graphs
Cai Heng Li, Yan Zhou Zhu
We introduce the concept of pseudocover, which is a counterpart of cover, for symmetric graphs. The only known example of pseudocovers of symmetric graphs so far was given by Praeg…
On the EKR Module property
Cai Heng Li, Venkata Raghu Tej
In the recent years, the generalization of the ErdÅs-Ko-Rado (EKR) theorem to permutation groups has been of much interest. A transitive group is said to satisfy the EKR-module pr…