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The vertices of a graph are classified into seven types by J.T. Hedetniemi, S.M. Hedetniemi, S.T. Hedetniemi and T.M. Lewis and they ask the following questions: 1) What is the smallest order of a graph having very typical vertices or typical vertices? 2) What is the smallest order of a pantypical graph? We answer these two questions in this paper.

生成讲解博客的中文版本

生成AI智能校验的中文版本