auxiliary file for SID: computes a path matrix efficiently (can probably be made faster)
auxiliary file for SID: computes a path matrix efficiently (can probably be made faster) This function takes an adjacency matrix G from a DAG and computes a path matrix for which entry(i,j) being one means that there is a directed path from i to j the diagonal will also be one.
boolean indicating whether G is a sparse matrix.
Jonas Peters <email@example.com>
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