Signed (0,2)-graphs with few eigenvalues and a symmetric spectrum

• Main Authors: Greaves, Gary Royden Watson, Stanić, Zoran
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Mathematics; Adjacency Matrix; Bipartite Double
• Online Access: https://hdl.handle.net/10356/162136
• Institution: Nanyang Technological University

We investigate properties of signed graphs that have few distinct eigenvalues together with a symmetric spectrum. Our main contribution is to determine all signed rectagraphs (triangle-free signed (Formula presented.) -graphs) with vertex degree at most 6 that have precisely two distinct eigenvalues...