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The following page has been changed by udanax: http://wiki.apache.org/hama/BigTableForGmail ------------------------------------------------------------------------------ '''Notice:''' It is also only my reasoning - If we walk on the From/To/Cc/Bcc links graph, we may find some unknown communities. + We can record who is connected to whom on a given social relation via an adjacency matrix. The adjacency matrix is a square, 1-mode from-by-to matrix like this: + || || A || B || C || D || E || F || G || + || A || || 1 || 0 || 1 || 0 || 0 || 1 || + || B || 1 || || 1 || 0 || 1 || 0 || 0 || + || C || 1 || 1 || || 1 || 1 || 0 || 0 || + || D || 1 || 1 || 1 || || 0 || 0 || 0 || + || E || 0 || 0 || 0 || 1 || || 1 || 0 || + || F || 0 || 0 || 0 || 0 || 1 || || 0 || + || G || 1 || 1 || 0 || 0 || 0 || 0 || || +