Now showing items 1-2 of 2

    • Bipartite biregular Moore graphs 

      Araujo Pardo, Martha Gabriela; Dalfó, Cristina; Fiol, Miguel Angel; López Lorenzo, Ignacio (Elsevier, 2021)
      A bipartite graph G=(V,E) with V=V1 U V2 is biregular if all the vertices of a stable set Vi have the same degree ri for i=1,2. In this paper, we give an improved new Moore bound for an infinite family of such graphs with ...
    • On the Laplacian spectra of token graphs 

      Dalfó, Cristina; Duque, F.; Fabila Monroy, R.; Fiol, Miguel Angel; Huemer, Clemens; Zaragoza Martínez, F.J.; Trujillo Negrete, A.L. (Elsevier, 2021)
      We study the Laplacian spectrum of token graphs, also called symmetric powers of graphs. The k-token graph Fk(G) of a graph G is the graph whose vertices are the k-subsets of vertices from G, two of which being adjacent ...