13 citations · 21 across the 7 of their papers we have counts for
3 papers · 1 filter
Constructing cospectral signed graphs
Francesco Belardo, Maurizio Brunetti, Matteo Cavaleri +1
A well--known fact in Spectral Graph Theory is the existence of pairs of isospectral nonisomorphic graphs (known as PINGS). The work of A.J. Schwenk (in 1973) and of C. Godsil and…
Total graph of a signed graph
Francesco Belardo, Zoran Stanić, Thomas Zaslavsky
The total graph is built by joining the graph to its line graph by means of the incidences. We introduce a similar construction for signed graphs. Under two similar definitions of…
Open problems in the spectral theory of signed graphs
Francesco Belardo, Sebastian M. Cioabă, Jack H. Koolen +1
Signed graphs are graphs whose edges get a sign or (the signature). Signed graphs can be studied by means of graph matrices extended to signed graphs in a natural way. Re…