The oriented bicyclic graphs whose skew-spectral radii do not exceed 2
The oriented bicyclic graphs whose skew-spectral radii do not exceed 2
Let $S(G^{\sigma})$ be the skew-adjacency matrix of the oriented graph $G^{\sigma}$ on order n and $\lambda _{1},\lambda _{2},\ldots, \lambda _{n}$ be all eigenvalues of $S(G^{\sigma})$ . The skew-spectral radius $\rho_{s}(G^{\sigma})$ of $G^{\sigma}$ is defined as $\max\{|\lambda _{1}|,|\lambda _{2}|,\ldots,|\lambda _{n}|\}$ . In this paper, we determine all the oriented bicyclic graphs …