Table 1.
The adjacency matrix
| variable1 | variable 2 | …… | variable n | |
|---|---|---|---|---|
| variable1 | 0 | A1,2 | A1,n | |
| variable 2 | A2,1 | 0 | A2,n | |
| ……… | 0 | |||
| variable n | An,1 | An,2 | 0 |
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