dnk onK dp dng B=1 11 11 dZ= P n n nK T Z ( ) , 1 , 2 ,   dT + K T n n n P Z ( ) , 1 , 2 ,   dP + T P n nK n Z , , , 1 2 ( )   dn1 + .+ 1 2 1 , , , , ( ) −   T P n n nK nK Z  dnK = P n n nK T Z ( ) , 1 , 2 ,   dT+ T n n nK P Z ( ) , 1 , 2 ,   dP + T P nC B K B nB Z   =   , , 1 ( ) dnB