M ( v , w ) ≃ μ ( v ) μ ( w ) ∑ δ = r  n − m   ( N − δ   + N δ  )     + ∑ δ = m  r − 1   N − δ   μ ( w ) Π δ − m + 1     ( w , v )   + ∑ δ = m  r − 1   N δ  μ ( v ) Π δ − m + 1     ( v , w )       ( 57 )     MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@981D@