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https://research.matf.bg.ac.rs/handle/123456789/722| Title: | More on Signed Graphs with at Most Three Eigenvalues | Authors: | Ramezani, Farzaneh Rowlinson, Peter Stanić, Zoran |
Affiliations: | Numerical Mathematics and Optimization | Keywords: | adjacency matrix;association scheme;simple eigenvalue;strongly regular signed graph;vertex-deleted subgraph;weighing matrix | Issue Date: | 2022 | Journal: | Discussiones Mathematicae - Graph Theory | Abstract: | We consider signed graphs with just 2 or 3 distinct eigenvalues, in particular (i) those with at least one simple eigenvalue, and (ii) those with vertex-deleted subgraphs which themselves have at most 3 distinct eigenvalues. We also construct new examples using weighing matrices and symmetric 3-class association schemes. |
URI: | https://research.matf.bg.ac.rs/handle/123456789/722 | ISSN: | 12343099 | DOI: | 10.7151/dmgt.2393 |
| Appears in Collections: | Research outputs |
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