Adjacency Matrix/Examples/Loop-Digraph
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Example of Adjacency Matrix
The adjacency matrix for a loop-digraph is not only not symmetrical about the main diagonal, it also has non-zero elements on that main diagonal:
$\qquad \begin{pmatrix} 1 & 1 & 0 & 1 \\ 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 \\ 1 & 0 & 1 & 0 \\ \end{pmatrix}$