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math.CO2026
On the number of spanning trees of bicirculant graphs
Jing Yang, Fangming Xian
A bi-Cayley graph over a cyclic group is called a bicirculant graph. Let be a bicirculant graph with $R=R^{-1}\subseteq \mathbb{Z}_n\setm…
math.CO2023
Circular External Difference Families: Construction and Non-Existence
Huawei Wu, Jing Yang, Keqin Feng
The circular external difference family and its strong version, which themselves are of independent combinatorial interest, were proposed as variants of the difference family to co…