The following directed graph represents a citation network wherein an edge i --> j indicates paper i has cited paper j as one of its references. Determine a weighted symmetric matrix such that for an entry (i, j): the value in the matrix indicates the number of papers each of which have cited both i and j together as references.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
---|---|---|---|---|---|---|
29 | 30 | 1 | 2 | 3 | 4 | 5 |
6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 |
27 | 28 | 29 | 30 | 31 | 1 | 2 |