5-regular oriented graphs with optimum skew energy

Lifeng Guo, Ligong Wang, Peng Xiao

Let $G$ be a simple undirected graph and $G^{\sigma }$ be the corresponding oriented graph of $G$ with the orientation $\sigma$. The skew energy of $G^{\sigma }$, denoted by ${\epsilon }_s(G^{\sigma })$, is de…