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1 paper

math.CO2025

On some classes of bivalent and trivalent planar graphs

Jorge Alencar, Jean-Guy Caputo, Leonardo de Lima +1

A graph is called bivalent or trivalent if there exists an eigenvector of the graph Laplacian composed from {-1,1} or {-1,0,1}, respectively. These bivalent and trivalent eigenvect…