81 



dTJv {v — by \ 1'=» v/,vy 



d"-p\ 2RT , RT /GO W 6" 



dT'J, {v-by^ ^ ^ {v -by ^ V ''" vi,v' ^ vkW 



dd , d-'d 



when ^' = — and 6" = — . (/z = v : vk)- 

 dn dn' 



Hence : 



2ak(v/c—bicy 



Vk 



RTk 



2{\-b'kY ^{v^,-bk)V'k 



Qak{vk—b ky 



yielding by division : 



2{\-b'i) + {vk-bk)^ ^, 



Ok-'UO'k+'Ue"k 

 b"k 



Vk (i-V3^';t+V,^'ï):(i-V.<9'A)' 

 as ^k apparently = 1. 



With Vk : bk^r, Vkb"k : {l—b'k=^"k, {l~-l^6'k-^'Ue"k) : {l—'i,6'k)z=oi 



we get : 



or 



•-1 



(3to— A) = 2(l- i'A-), 



r—\ 2 l—b'i 



r - 3 CO-VJ3", ' ^^"^ 



SO that (2a) differs from (2) only in this, that now to — '/, /i"yt occurs 

 in the denominator instead of 1 — Vs ^"^ • 

 We now find for RTk and pk: 



ak 1 /'r-n*2(l-V,6''^) 



i?n.= 



pic 



bk »* 



1— 6'ii 



r-1 2(l-V/ A.) 

 r 1 — 6'jfc 



— 1 



(3a) 

 (4a) 



s becoming 



/^_1Y 2(1-7, 



V ^' ; 1-6' 



,_1 2(1-V,<9',) 



-v.^ 

 i 



(5a) 



1—6'; 



In this the factor 1 — 7/^ï- always occurs as a multiplicator 

 of 2 : [l—b'ic). 



4* 



