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The unoriented incidence matrix (or simply incidence matrix) of an undirected graph is a  matrix B, where n and m are the numbers of vertices and edges respectively, such that  if the vertex v<sub>i</sub> and edge e<sub>j</sub> are incident and 0 otherwise.
 
The unoriented incidence matrix (or simply incidence matrix) of an undirected graph is a  matrix B, where n and m are the numbers of vertices and edges respectively, such that  if the vertex v<sub>i</sub> and edge e<sub>j</sub> are incident and 0 otherwise.
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无向图的无向关联矩阵(或者简单的关联矩阵)是一个矩阵''B'',其中''n''和''m'' 分别是顶点和边的数目,如果顶点 v<sub>i</sub> 和边 e<sub>j</sub>是关联的,则为1,否则为0。
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无向图的无向关联矩阵(或者简单的关联矩阵)是一个矩阵''B'',其中 ''n'' 和 ''m'' 分别是顶点和边的数目,如果顶点 v<sub>i</sub> 和边 e<sub>j</sub>是关联的,则为1,否则为0。
     
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