👉 An inselberg is a type of graph with a large number of isolated vertices. It is named after the mathematician Wolfgang Insel, who first described this type of graph in his 1927 paper "On the structure of graphs". The term was coined by mathematicians and computer scientists to describe such graphs as having many isolated vertices that do not form any connected components. In a graph, an isolated vertex is a vertex with no adjacent vertices. In an inselberg, there