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    • Graphs, friends and acquaintances 

      Dalfó, Cristina; Fiol, Miguel Angel (Faculty of Mathematics and Natural Sciences; Institut Teknologi Bandung (ITB) Indonesia; Indonesian Combinatorial Society (InaCombS); GTA Research GroupGTA Research Group, 2018)
      A graph is a mathematical object modeling the existence of a certain relation between pairs of elements of a given set. Many of the first results concerning graphs made reference to relationships between groups of people. ...