Supported by the National Natural Science Foundation of China (Grant No.10871032);Innovation Project for the Development of Science and Technology (IHLB) (Grant No.201098);the Specific Research Fund of the Doctoral Program of Higher Education of China (Grant No.20060285002)
Let G be a group. We consider the set cd(G)/{m}, where m ∈ cd(G). We define the graph △(G - m) whose vertex set is p(G - m), the set of primes dividing degrees in cd(G)/{m}. There is an edge between p an...
国家自然科学基金(No.10871021;No.10871032);"Agencija za raziskovalno dejavnost Republike Slovenije";proj.mladi raziskovalci;"Agencija za raziskovalno dejevnost Republike Slovenije".research program P1-0285;高等学校博士学科点专项科研基金(No.20060285002)资助的项目.