M ( v , w ) = ∑ δ = m  n − m   N − δ   μ ( w ) Π δ − m + 1   ( w , v )      + ∑ δ = m  n − m   N δ  μ ( v ) Π δ − m + 1   ( v , w )             ( 56 )   MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=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@78C7@