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    • On the beta-number of forests with isomorphic components 

      Ichishima, R.; López Masip, Susana-Clara; Muntaner Batle, Francesc Antoni; Oshima, A. (De Gruyter Open, 2018)
      The beta-number, β (G), of a graph G is defined to be either the smallest positive integer n for which there exists an injective function f : V (G) → {0, 1, . . . , n} such that each uv ∈ E (G) is labeled |f (u) − f (v)| ...