About Egawa Yoshimi
About Department of Applied Mathematics, Tokyo University of Science, Shinjuku-ku, Tokyo, 162-8601, Japan
About Kotani Keiko
About Department of Mathematics, Tokyo University of Science, Shinjuku-ku, Tokyo, 162-8601, Japan
About Nakamura Shunsuke
About Department of Applied Mathematics, Tokyo University of Science, Shinjuku-ku, Tokyo, 162-8601, Japan
About AKCE International Journal of Graphs and Combinatorics
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About contraction (mathematics)
About graph
About 連結グラフ
About 4-connected graph
About Contractible edge
About Triangle
About Basics of graph theory
About 三角形
About 連結グラフ
About エッジ
About 収縮
About 数