Construction of cospectral graphs, signed graphs and \(\mathbb{T}\)-gain graphs via partial transpose

DOI10.1007/s10801-024-01332-zzbMath1547.05104MaRDI QIDQ6604503

Matteo Cavaleri, Francesco Belardo, Alfredo Donno, Maurizio Brunetti

Publication date: 12 September 2024

Published in: Journal of Algebraic Combinatorics (Search for Journal in Brave)

zbMATH Keywords

cospectralitytournamentnormal matrixpartial transposedigraph composition\(\mathbb{T}\)-gain digraph

Mathematics Subject Classification ID

Graphs and linear algebra (matrices, eigenvalues, etc.) (05C50) Directed graphs (digraphs), tournaments (05C20) Isomorphism problems in graph theory (reconstruction conjecture, etc.) and homomorphisms (subgraph embedding, etc.) (05C60) Signed and weighted graphs (05C22) Graph operations (line graphs, products, etc.) (05C76)

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