∑ i  ∑ j  ∑ l ≠ j   | F i  ∩ G j  | | F i  ∩ G l  | | F ¯  i  ∩ G l  | | F ¯  i  ∩ G j  |             ( 8 )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@6619@