159 citations
- Roma Tre UniversityIT19 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT7 papers
- Politecnico di MilanoIT7 papers
- Sapienza University of RomeIT7 papers
- University of Naples Federico IIIT7 papers
- University of Rome Tor VergataIT7 papers
- Giustino Fortunato UniversityIT6 papers
- Graz University of TechnologyAT6 papers
- Mediterranean Institute of Fundamental PhysicsIT6 papers
- Chinese Academy of SciencesCN5 papers
- Gubkin Russian State University of Oil and GasRU5 papers
- Institute of AcousticsCN4 papers
13 papers · 1 filter
On the subdirect product of graph bundles
Yanga Bavuma, Francesco G. Russo, Stefano Spessato
The subdirect product of two finite groups and is defined as a subgroup of the direct product , which is a well-known notion in finite group theory. While it is…
On cospectrality of gain graphs
Matteo Cavaleri, Alfredo Donno
We define -cospectrality of two -gain graphs and , proving that it is a switching isomorphism invariant. When is a finite group, we prove that -cospec…
Characterizations of line graphs in signed and gain graphs
Matteo Cavaleri, Daniele D'Angeli, Alfredo Donno
We generalize three classical characterizations of line graphs to line graphs of signed and gain graphs: the Krausz's characterization, the van Rooij and Wilf's characterization an…
Gain-line graphs via -phases and group representations
Matteo Cavaleri, Daniele D'Angeli, Alfredo Donno
Let be an arbitrary group. We define a gain-line graph for a gain graph through the choice of an incidence -phase matrix inducing . We prove that the switching eq…
A group representation approach to balance of gain graphs
Matteo Cavaleri, Daniele D'Angeli, Alfredo Donno
We study the balance of -gain graphs, where is an arbitrary group, by investigating their adjacency matrices and their spectra. As a first step, we characterize switching eq…
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…