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Home >> Seminar

The nullity of a graph

郭继明 教授(华东理工大学数学系主任)
Sunday, May 5th, 2019, 10:00 AM  闵行数学楼401报告厅
报告摘要: Let G=(V(G), E(G)) be a simple connected graph with vertex set V(G)={v_1, v_2, …, v_n} and edge set E(G). Its adjacency matrix A(G)=a_{ij}) is defined as the n by n matrix (a_{ij}), where a_{ij}=1 if v_i is adjacent to v_j, and a_{ij}=0, otherwise.

The nullity of G is the multiplicity of 0 as an eigenvalue of A(G). In this talk, we will introduce some old and new results on the nullity of a graph.

主持人:詹兴致 教授
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