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二部双圈图的拉普拉斯系数

On the Laplacian Coefficients of Bipartite Bicyclic Graphs
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摘要 设G为n阶图,P(G;x)=det(xIn-L(G))=∑_(k=0)~n(-1)~kck(G)x~^(n-k)为图G的拉普拉斯特征多项式.本文确定了在所有的n阶连通二部双圈图中拉普拉斯系数最小的图. Let G be a graph of order n, P(G;x)=det(xIn-L(G))=∑nk=0(-1)kck(G)xn-k be the characteristic polynominal of its Laplacian matrix. In this paper, we determine the graph with the smallest k-th Laplacian coefficient among all connected bipartite bicyclic graphs of order n.
出处 《数学进展》 CSCD 北大核心 2013年第6期806-816,共11页 Advances in Mathematics(China)
基金 上海市自然科学基金(No.12ZR1420300) 国家自然科学基金(No.11101284 No.11126095 No.11201303)
关键词 二部双圈图 特征多项式 拉普拉斯特征多项式 拉普拉斯系数 bipartite bicyclic graph characteristic polynomial Laplacian characteristicpolynomial Laplacian coeiTicient
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