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The discrete Laplacian (or Kirchhoff matrix) is obtained from the oriented incidence matrix B(G) by the formula

The discrete Laplacian (or Kirchhoff matrix) is obtained from the oriented incidence matrix B(G) by the formula

离散的拉普拉斯矩阵(或基尔霍夫矩阵)是由定向的关联矩阵 b (g)通过公式得到的

离散的'''<font color="#ff8000">拉普拉斯矩阵(或基尔霍夫矩阵) Laplacian (or Kirchhoff Matrix)</font>'''是由定向的关联矩阵''B''(''G'')通过公式得到的

: <math>B(G) B(G)^\textsf{T}.</math>

: <math>B(G) B(G)^\textsf{T}.</math>