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More on Numbers and Graphs (1905.13387v1)
Published 31 May 2019 in math.CO and cs.DM
Abstract: In this note we revisit a "ring of graphs" Q in which the set of finite simple graphs N extend the role of the natural numbers and the signed graphs Z extend the role of the integers. We point out the existence of a norm which allows to complete Q to a real or complex Banach algebra R or C.