Matrix multiplication and adjacency matrix Proof of the associative law of matrix multiplication\(:\)
\[\begin{aligned}((\mathbf{AB}) \mathbf{C})[i, j] & \\ &=\sum_{l=1 }^{c}\left(\sum_{k=1}^{b} \
Matrix multiplication and adjacency matrix Proof of the associative law of matrix multiplication\(:\)
\[\begin{aligned}((\mathbf{AB}) \mathbf{C})[i, j] & \\ &=\sum_{l=1 }^{c}\left(\sum_{k=1}^{b} \