4 papers
Regular, and (bi-)rotary Hall Cayley maps
Wendi Di, Zheng Guo, Cai Heng Li
A classification is given of regular, rotary, and birotary Cayley maps of which the vertex number is coprime to the valency. The classification is involved in constructions of new…
On the multipliers of a Singer quadrangle
Wendi Di, Tao Feng
A finite generalized quadrangle $\cS$ is a Singer quadrangle if it has an automorphism group that acts sharply transitively on its points. In this paper, we introduce the notion of…
Hall Skew-morphisms and Hall Cayley maps of finite groups
Wendi Di, Zheng Guo, Cai Heng Li
A characterization is given of finite groups that have skew-morphisms of order coprime to the order , and their skew-morphisms. A complete classification is then given of…
On central difference sets in Suzuki -groups of type
Wendi Di, Zhiwen He
In this paper, when the order of is even, we prove that there exists no central difference sets in and establish some non-existence results of central partial differ…