and 



where 



and 



C(W) = (C,) =1 C^ 1 (37c) 



= 1 r _ ^ ^11 ^11 9U_ _ ^ ^11 ^12 9U 

 *^1 ~ 2 f, U dl, U dlr 



A 3u A 3u 



+ ®ii '^*^§irg22-^2 "^^ "^ 



-Z 2 f„ U 1^21 3£, ^22 3£, 



M"i S^ -^ "2 S: J-^ ^11 ^(§12+^21+^ -°' «) ^^^^) 



+ e^^ Kg(g22-girt ^°" "^ 



s = ^(^)-M^li:-^lf )+^^-^^^« ^'''^ 



20 



