:    signal(v, w) ← S(v→w)=d(v)∏i∈P(v,w)d(i)F(c) MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGtbWucqGGOaakcqWG2bGDcqGHsgIRcqWG3bWDcqGGPaqkcqGH9aqpdaWcaaqaaiabdsgaKjabcIcaOiabdAha2jabcMcaPaqaamaarababaGaemizaqMaeiikaGIaemyAaKMaeiykaKcaleaacqWGPbqAcqGHiiIZcqWGqbaucqGGOaakcqWG2bGDcqGGSaalcqWG3bWDcqGGPaqkaeqaniabg+GivdaaaOGaemOrayKaeiikaGIaem4yamMaeiykaKcaaa@4DCA@