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Keywords:
spectra of graphs; squares of graphs; bipartite graphs; metrically regular graphs (MRG); association scheme
spectra of graphs; squares of graphs; bipartite graphs; metrically regular graphs (MRG); association scheme
Summary:
Metrically regular bigraphs the square of which are metrically regular graphs are investigated in the case of graphs with 6 distinct eigenvalues (these eigenvalues can have variuos multiplicities).
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References:
[1] Bauer L.: Association Schemes I. Arch. Math. (Brno) 17 (1981), 173-184. MR 0672657 | Zbl 0479.05020
[2] Vetchý V.: Metrically regular square of metrically regular bigraphs I. Arch. Math. (Brno), Tomus 27b (1992), 183-197. MR 1189214
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