∑ i  ∑ j  | F i  ∩ G j  |     ∑ k ≠ i   | F k  ∩ G j  | ( S i , k   − | F i  ∩ G j  | | F k  ∩ G j  |  )          ( 12  )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@6E4A@