Definitions for "Adjacency Matrix"
A 0-1 square matrix whose rows and columns are indexed by the vertices. A 1 in the ij-th position of the matrix means that there is an edge (or arc) from vertex i to vertex j. A 0 indicates that there is no such edge (or arc). Can be used for both graphs and digraphs.
For an - atom molecule, an matrix with unity as the , th entry if atoms and share a covalent bond; otherwise it is zero.
a means of representing a graph in the form of a matrix