An adjacency matrix is a matrix showing which vertices of a graph are adjacent to which other vertices.
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If your graph is undirected, then its adjacency matrix will be symmetric. Faizan
adjacency matrix- since the edges are the relationship between two vertices ,the graph can be represented by a matrix,
parallel edges
Advantages are that you can see the arc lengths disadvantages some times it doesn't work because of insufficient vertices's or arcs.
no, the correct matrix to use is PQRS P1010 Q0101 R1100 S0010