qdist ( T , T ′  ) = shared ( T , T ) + shared ( T ′  , T ′  )    −   2 ⋅ shared ( T , T ′  ) − nonshared ( T , T ′  )           ( 1 )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@7CB7@