The work extends prior factorizations of graph spectra to iterated operad compositions via Schröder trees and edge colorings, covering universal adjacency spectra and generalized characteristic polynomials.
Spectra of graphs obtained by a generalization of the join graph operation.Discrete Mathematics, 313(5):733–741
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Polynomial and spectra factorization of graphs obtained by iteration the operad of generalized graph composition
The work extends prior factorizations of graph spectra to iterated operad compositions via Schröder trees and edge colorings, covering universal adjacency spectra and generalized characteristic polynomials.