G. Q + G, Q = 1, and 
ai A o 
f f 
one finds: 
2271 21 22 21 1i! 32,7121 
- a” = - to Bo G. ) 8 
f ff f 
«1 
22-21 2354233 1221.21 
=; -G + 075, (ey ) 
wl 
fo Ale su221" 14 iq T atl) 
f f 
“1 
2] 11 
26 
fn 
and: 
227] 1 22 ya 
Q AP 1 = (Ge Mg Gr © ) A i 
22 1 21 T 21.T 
= GEAR 1 + BAP hr g, BP 
21 Pa (121 11.7 MT 
: Gy G, te, AP 1+ GAP 1 - GAP 1} 
2 21 T 2a ba 1i 1 
ex. - gflalpu -oro {x; - GAP tH 
“il 
2 21.11 à 
= x, "5, St % 
-2 
- X, 
So: 
xl I 0 xl 
cl]. oi f 
2 21 11 -2 
X Go I X. 
which is formula (2.10). 
- 335 -