Note on the skew energy of oriented graphs

Abstract

The skew energy of oriented graphs is de ned as the sum of the norms of all the eigenvalues of the skew adjacency matrix. In this note, we obtain some upper bounds for the skew energy of any oriented graphs, which improve the known upper bound obtained by Adiga et al.

Keywords

• oriented graph
• skew adjacency matrix
• skew spectral radius
• skew energy