Being a separation of (n1 1 n' 2 n3 3 ...) and the summation being in regard to all such separations.
0 b31 b32 b33 ï¿½ï¿½ï¿½ b3n 0 0 0 ...0 bra b,, 2 b n3 .ï¿½.
NH 4 N3 and N2H4 N3H.
May be the same or different, it is necessary that every product of umbrae which arises in the expansion of the symbolic product be of degree n, in a l, a 2; in the case of b,, b 2 of degree n 2; in the case of c 1, c 2 of degree n3; and so on.
Taking the case where the motion is strictly in two dimensions, we may write as the polar equation of the surface at time t r =a cos nB cos pt, (4) where p is given by p2 = (n3_ n)..