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math.CO2025
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…
math.CO2022★ 2 cited
Godsil-McKay switchings for gain graphs
Matteo Cavaleri, Alfredo Donno, Stefano Spessato
We introduce a switching operation, inspired by the Godsil-McKay switching, in order to obtain pairs of -cospectral gain graphs, that are gain graphs cospectral with respect to…