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Ix 
where 
Next define diagonal 
ri 
16 
Pp 
Similarly, let O°, Q,, and Q, be diagonal matric 
lements q%, ¢;,, and q, respectively, wher 
In view of (7) and (9), we have 
23) 
(24) 
0°= (1+) "1g Po, 
LC 
(1+) 1P, - (I - de-'P, 
We can at once verify the following relations: 
23) 
A 
4 
wv A° + P A° _ A°F, 
oB°{PB 
- Ce 1 
9] Morishima - pag. 1-